1. Blaauw, A., Schmidt, M. (eds.). 1965, Galactic Structure: Stars and Stellar Systems Volume V, Univ. of Chicago Press.Google Scholar

2. Bok, B. J. 1966, Sky and Telescope, 31, 357.Google Scholar

3. Bok, B. J. 1966, Sky and Telescope, 31, 271 and 341.Google Scholar

4. Report of ‘Tenth Herstmonceux Conference'. 1966, Observatory, 86, 180.Google Scholar

5. Kharadze, E. K. 1965, Abastumani astroph. Obs. Bull., no. 33.Google Scholar

6. Beer, A. (ed.). 1966, Vistas in Astronomy, Vol. 7, Pergamon Press.Google Scholar

7. Beer, A., Strand, K. Aa. (eds.). Vistas in Astronomy, Vol. 8, Pergamon Press.Google Scholar

8. Trans. IAU, 12 B, 389, 1966.Google Scholar

9. Voigt, H. H. (ed.) 1965, Landolt-Börnstein, Group VI, Vol. I, Springer-Verlag.Google Scholar

10. Ogorodnikov, K. F. 1965, Dynamics of Stellar Systems (Transl. by Sykes, J. B. and Beer, A.), Pergamon Press.Google Scholar

1. Kutuzov, S. A. Tartu astr. Obs. Teated, no. 9, 1964; also, no. 16, 1965.Google Scholar

2. Einasto, J. E. 1965, Tartu astr. Obs. Teated, no. 17.Google Scholar

3. Einasto, J. E., Kutuzov, S. A. 1964, Tartu astr. Obs. Teated, nos. 10 and 11.Google Scholar

4. Genkin, I. L. 1965, Publ. astroph. Inst. Alma-Ata, 5, 101.Google Scholar

5. Oort, J. H. 1966, Trans. IAU, 12 B, 315.Google Scholar

6. Einasto, J. E. 1966, Trans. IAU, 12 B, 436.Google Scholar

7. Stothers, R., Tech, J. L. 1964, Mon, Not. R. astr. Soc, 127, 287.Google Scholar

8. Wayman, P. A. 1966, Observatory, 86, 184.Google Scholar

9. Blaauw, A. 1965, Galactic Structure: Stars and Stellar Systems, Vol. V, 438.Google Scholar

10. Johnson, H. L. 1966, Vistas in Astronomy, 8, 133; see also the chapter by Johnson, H. L. in the forthcoming Volume VII of Stars and Stellar Systems, Nebulae and Interstellar Matter (available in Pre-print form from the Lunar and Planetary Laboratory, Univ, of Arizona, Tucson, Arizona).CrossRefGoogle Scholar

11. Becker, W. Z. Astrophys., 64, 77, 1966; see also Observatory,86, 180, 1966.Google Scholar

12. Johnson, H. L., Svolopoulos, S. 1961, Astrophys. J., 134, 868.CrossRefGoogle Scholar

13. Plaut, L. 1965, Galactic Structure: Stars and Stellar Systems, Vol. V, Chapter 13.Google Scholar

14. Kinman, T. D., Wirtanen, C. A., Janes, K. A. Astrophys. J. Suppl., 11, no. 100, 1965; and 13, no. 119, 1966; Contr, Lick Obs., nos. 174 and 202.Google Scholar

1. Jaschek, C., Condé, H., de Sierra, A. C. 1964, Publ. Obs. La Plata, Ser. Astr, 28, Part II.Google Scholar

2. Bidelman, W. P. 1966, Vistas in Astronomy, 8, 53.CrossRefGoogle Scholar

3. Abt, H. A. 1963, Astrophys. J. Suppl, 8, no. 75.Google Scholar

4. Lindoff, U., Lyngå, G. 1965, Lund Medd, Series II, no. 146.Google Scholar

5. Strömgren, B. 1966, A. Rev. Astr. Astrophys., 4, 433.Google Scholar

6. Bertiau, F. C., Burley, J. M., McCarthy, M. F. 1965, Ric. astr. Vatican, 7, 21.Google Scholar

7. Fricke, W. Vistas in Astronomy, 8, 205, 1966; Z. Astrophys., 61, 20, 1965.Google Scholar

8. Adams, A. N., Bestul, S. M., Scott, D. K. 1964, Publ. U.S. naval Obs., Second Series, 19, Part I.Google Scholar

9. Hofflei, D. 1964, Catalogue of Bright Stars, Third Revised Edition, Yale Observatory.Google Scholar

10. Westerlund, B. E. 1966, Astrophys. J., 145, 724.CrossRefGoogle Scholar

11. Stephenson, C. B. 1966, Astr. J., 71, 477.Google Scholar

1. Hodge, P. W., Wallerstein, G. 1966, Publ. astr. Soc. Pacif., 78, 411.CrossRefGoogle Scholar

2. McCuskey, S. W., Rubin, R. H. 1966, Astr. J., 71, 517.Google Scholar

3. Ljunggren, B., Oja, T. 1965, Uppsala Obs. Medd., no. 150.Google Scholar

4. Van Herk, G. 1965, Bull. astr. Inst. Netherlands, 18, 71.Google Scholar

5. Woolley, R. v. d. R., Aly, K. 1966, R. Obs. Bull., no. 114.Google Scholar

6. Sturch, C. 1966, Astrophys. J., 143, 774.Google Scholar

7. Perek, L. 1951, Brno Contr., 1, no. 8.Google Scholar

8. Plaut, L., Soudan, A., 1963, Bull. astr. Inst. Netherlands, 17, 70.Google Scholar

9. McCuskey, S. W. 1966, Vistas in Astronomy, 7, 141.CrossRefGoogle Scholar

10. Sanduleak, N. 1964, Doctoral Thesis, Case Inst. of Techn. (unpublished).Google Scholar

11. Sandage, A. R. 1957, Astrophys. J., 125, 422 and 435.Google Scholar

12. Eelsalu, H., Jôeveer, M. Tartu Astr. Obs. Publ., 34, 47 and 121, 1964; 35, 49, 1966.Google Scholar

13. Jôeveer, M., Eelsalu, H., Silvet, H. Tartu Astr. Obs. Publ., 36 (in press).Google Scholar

14. Luyten, W. J. (ed.). 1964, First Conference on Faint Blue Stars,Strasbourg, August.Google Scholar

1. Blaauw, A. 1960, Stars and Stellar Systems: Galactic Structure,Vol. V, 435.Google Scholar

2. Sandage, A. 1962, Astrophys. J., 135, 349.Google Scholar

3. Burbidge, G. R. 1962, Ann, Rev. Nuclear Science, 12, 507.Google Scholar

4. Arp, H. C. 1965, Stars and Stellar Systems: Galactic Structure, Vol. V, 401.Google Scholar

5. Böhm-Vitense, E., Holweger, H., Kohl, K. 1963, Astrophys. J., 138, 604.Google Scholar

6. van den Bergh, S. 1962, Astr. J., 67, 486.Google Scholar

7. Plaut, L. 1965, Stars and Stellar Systems: Galactic Structure,Vol. V, 267.Google Scholar

8. Geyer, E. 1962, Kleine Veröff,, Remeis-Sternwarte, Bamberg, no. 34, 121.Google Scholar

9. Preston, G. W. 1964, A. Rev. Astr. Astrophys., 2, 30.Google Scholar

10. Kinman, T. D., Wirtanen, C. A., Janes, K. A. 1966, Astrophys. J, Suppl., 13, no. 119.CrossRefGoogle Scholar

11. Plaut, L. 1963, Bull. astr. Inst. Netherlands, 17, 75.Google Scholar

12. Preston, G., Wallerstein, G. 1963, Astrophys. J., 138, 820.Google Scholar

13. Kraft, R. P. 1963, Stars and Stellar Systems: Basic Astronomical Data, Vol. III, 421.Google Scholar

14. Wallerstein, G. 1962, Astr. J., 67, 329.Google Scholar

15. Upgren, A. R. 1963, Astr. J., 68, 475.Google Scholar

16. Becker, W. 1965, Z. Astrophys., 62, 54.Google Scholar

17. Iwanowska, W. I. 1966, Vistas in Astronomy, 7, 133.Google Scholar

1. McCuskey, S. W. 1965, Stars and Stellar Systems: Galactic Structure, Vol. V, Chapter 1.Google Scholar

2. McCuskey, S. W. 1966, Vistas in Astronomy, 7, 141.Google Scholar

3. McCuskey, S. W. 1966, Trans. IAU, 12 B, 425.Google Scholar

4. Mumford, G. S. 1957, Sky Telesc, 16, 214.Google Scholar

5. Report of ‘Tenth Herstmonceux Conference’ 1966, Observatory, 86, 182 to 184.Google Scholar

6. Bonneau, M. 1965, Ann. Obs. Besancon, 6, Fasc. V.Google Scholar

7. Blaauw, A. 1965, Verslagen Afd. Natuurkunde, Kon, Nederl. Akad. Wetenschappen, 74. no. 4.Google Scholar

8. McCuskey, S. W., Rubin, R. H. 1966, Astr. J., 71, 517.Google Scholar

9. Mavridis, L. N. 1965, Lecture Notes of NATO International Summer Course, Observational Aspects of Galactic Structure,Lecture XVI, Athens.Google Scholar

10. Mavridis, L. N. 1966, Colloquium on Late-Type Stars, Trieste, 13-17 June.Google Scholar

11. Brodbeck, K. 1963, Z, Astrophys., 58, 127.Google Scholar

12. Fenkart, R. 1964, Z. Astrophys., 59, 56.Google Scholar

13. Wick, Ch. 1965, Z. Astrophys., 61, 110.Google Scholar

14. Graham, J. A., Lyngå, G., 1965, Memoirs Mt. Stromlo Obs., no. 18.Google Scholar

15. Lyngå, G. 1964, Lund Medd., Series II, no. 141.Google Scholar

16. Bok, B. J. 1964, Astr. J., 69, 533.Google Scholar

17. McCuskey, S. W. 1964, Astr. J., 69, 104.Google Scholar

18. Apriamaschvili, S. P., Kuznetsov, V. I. 1966, Abastumani astroph. Obs. Bull., 35, 46.Google Scholar

19. Voroshilov, V. I. 1966, Problems of Astrophysics and Physics of Stars and Diff. Matter, Naukova Dumka Press, Kiev; Voroshilov, V. I., Poleshchuk, E. P. (in press).Google Scholar

20. Fedorchenko, G. L. Res. on Physics of Stars and Diff. Matter, p. 63, 1964, and Problems of Astrophysics, Naukova Dumka Press, Kiev, 1966.Google Scholar

21. Apriamaschivili, S. P. 1964, Abastumani astroph. Obs. Bull., 30, 49; 31, 27.Google Scholar

22. McCuskey, S. W. 1966, Trans. IAU, 12 B, 425.Google Scholar

23. Lisicki, A. 1965, Stud. Soc. Sci. Torun ,3, no. 6, 1.Google Scholar

24. Dolidze, M. B. 1964, Abastumani astroph. Obs. Bull., 30, 71.Google Scholar

25. Kolesnik, L. N. 1964, Res. on Physics of Stars and Diff. Matter, p. 52, Naukova Dumka Press, Kiev.Google Scholar

26. Kharadze, E. K., Apriamaschvili, S. P., Kochlaschvili, 1964, Abastumani astroph. Obs Bull., 31, 3.Google Scholar

27. Kolesnik, L. N. 1965, Abastumani astroph. Obs. Bull., 33, 41.Google Scholar

28. Dolidze, M. B. Abastumani astroph. Obs. Bull., 30, 81, 1964; 32, 53, 1965.Google Scholar

29. Lunel, M. J. Observateurs, (in press).Google Scholar

30. Masnauskas, J. 1964, Vilnius astr. Obs. Bull., no. 12.Google Scholar

31. Brodskaya, E. S., Grigorieva, N. B. Soobšč. gos. astr. Inst. P. K. Sternberga, no. 136, 1964; Grigorieva, N. B., Astr. Zu., 41, 185, 1964; Izv. Krym. astrofiz. Obs.,34, 238, 1965.Google Scholar

32. Raznik, R. M. 1964, Izv, Krym. astrofiz. Obs., 32, 165.Google Scholar

33. Blanco, V. M., Fitzgerald, M. P. 1964, Publ. astr. Soc. Pacific, 76, 438.Google Scholar

34. McCuskey, S. W., Houk, N. 1964, Astr. J., 69, 412.CrossRefGoogle Scholar

35. Ampel, R. 1964, Torun Obs. Bull., no. 35, 52.Google Scholar

36. Grigorieva, N. B. 1965, Izv. Krym. astrofiz. Obs., 34, 238.Google Scholar

37. Oja, T. 1966, Uppsala Obs. Annals, 5, no. 4.Google Scholar

38. Oja, T. 1966, Uppsala Obs. Medd., no. 157.Google Scholar

39. Kalandadze, N. B. 1964, Abastumani astroph. Obs. Bull., 31, 66.Google Scholar

40. Bartkus, R., Vilnius astr. Obs. Bull., no. 13, 32, 1964; no. 15, 28, 1965.Google Scholar

41. Rubin, V. C. 1965, Astrophys. J., 142, 934.Google Scholar

42. McCarthy, M. F., Treanor, P. J. Ric. astr. Vatican, 6, 511, 1964; 7, 177, 1965.Google Scholar

43. Karlsson, B. 1965, Lund Medd., Series II, no. 145.Google Scholar

44. Sher, D. 1965, Q. J. R. astr. Soc, 6, 299.Google Scholar

45. Feinstein, A. 1963, Publ. astr, Soc. Pacific, 75, 269.Google Scholar

46. Faulkner, D. J. 1963, Publ. astr. Soc. Pacific, 75, 269.Google Scholar

47. Graham, J. A., Lyngå, G. 1965, Mt Stromlo Obs. Memoirs, no. 18.Google Scholar

48. Trans. IAU, 1966, 12 B, 399 and 340.Google Scholar

49. Westerlund, B. E. 1965, Mon. Not. R. astr, Soc, 130, 45.Google Scholar

50. Lyngå, G. Lund Medd., Series II, nos. 139, 140, and 141, 1964; nos. 142 and 143, 1965.Google Scholar

51. Lyngå, G. Mt Stromlo Observatory Symposium on ‘Radio and Optical Studies of the Galaxy', May, 1966, p. 61.Google Scholar

52. Bok, B. J., Bok, P. F., Graham, J. A. 1963, Publ. astr. Soc. Pacif, 75, 514.Google Scholar

53. Graham, J. A. 1966, Bull, astr. Inst. Netherlands, 18, 372.Google Scholar

54. Whiteoak, J. B. 1963, Mon. Not. R. astr. Soc, 125, 105.Google Scholar

55. Johnson, H. L. 1965, Astrophys. J., 141, 923.Google Scholar

56. Haug, U., Pfleiderer, J., Dachs, J. 1966, Z. Astrophys,, 64, 140.Google Scholar

57. Mowat, M. Mt Stromlo Observatory Symposium on ‘Radio and Optical Studies of the Galaxy', May, 1966, p. 103.Google Scholar

58. Roslund, C., 1966, Lund Medd., Series I, nos. 207, 212, and 213.Google Scholar

59. Bok, B. J., Bok, P. F., Graham, J. A. 1966, Mon. Not. R. astr. Soc, 131, 247.Google Scholar

1. Becker, W. 1964, Z. Astrophys., 58, 202.Google Scholar

2. Schmidt-Kaler, Th. 1966, Trans. IAU, 12 B, 417.Google Scholar

3. Abt, H. A., Bautz, L. P. 1963, Astrophys. J., 138, 1002.Google Scholar

4. Fletcher, E. S. 1963, Astr. J., 68, 407.Google Scholar

5. Mowat, M. Mt Stromlo Observatory Symposium on ‘Radio and Optical Studies of the Galaxy', May, 1966, p. 100.Google Scholar

6. Kardashev, N. S., Lozinskaya, T. A., Sleptsova, N. F. 1964, Astr. Zu,, 41, 601 (see also Soviet Astr. A. J.,8, 479, 1965).Google Scholar

7. Kostyakova, E. B. 1965. Astr. Zu., 42, 537 (see also Soviet Astr. A. J.,9, 426, 1965).Google Scholar

8. Pskovskii, Y. P. 1965, Astr, Zu., 42, 1184 (see also Soviet Astr. A. J.,9, 919, 1966).Google Scholar

9. Pavlovskaya, E. D., Sharov, A. S. 1966, Astr. Zu., 43, 40 (see also Soviet Astr. A. J., 9, 30, 1966).Google Scholar

10. Pronik, I I. 1965, Astr. Zu., 42, 923 (see also Soviet Astr. A. J.,9, 709, 1966).Google Scholar

11 Smith, L. F. Mt Stromlo Observatory Symposium on ‘Radio and Optical Studies of the Galaxy,’ May, 1966, p. 96; see also her unpublished Doctoral Thesis, Australian National University, 1966.Google Scholar

12. Muhleman, D. O., Walker, R. G. 1964, Astr. J., 69, 95.Google Scholar

13. Schmidt-Kaler, Th. Z. Astrophys., 58, 217, 1964; 63, 131, 1966.Google Scholar

14. Behr, A. Z. Astrophys., 61, 182, 1965; 63, 133, 1966.Google Scholar

15. Isserstedt, J., Schmidt-Kaler, Th., 1964, Z. Astrophys., 59, 182.Google Scholar

16. Elsässer, H., Haug, U. 1960, Z. Astrophys., 50, 121.Google Scholar

17. Elsässer, H., Neckel, Th., Scheffler, H. 1965, Z. Astrophys., 63, 1.Google Scholar

18. Lyngå, G. Lund Medd., Series II, nos. 139, 140, and 141, 1964; and nos. 142 and 143, 1965.Google Scholar

19. Lyngå, G. Mt Stromlo Observatory Symposium on ‘Radio and Optical Studies of the Galaxy', May, 1966, p. 61.Google Scholar

20. Sher, D. Q. J. R. astr. Soc, 6, 299, 1965.Google Scholar

21. Thackeray, A. D. 1956, Nature, 178, 1458.Google Scholar

22. Bok, B. J. 1964, IAU/URSI Symposium no. 20, p. 147.Google Scholar

23. Report of ‘Tenth Herstmonceux Conference'. 1966, Observatory, 86, 182.Google Scholar

1. Perry, C. L. 1965, Doctoral Thesis, Univ. of California (unpublished).Google Scholar

2. Slettebak, A., Stock, J. 1959, Hamburg Obs. Publ., 5, no. 5.Google Scholar

3. Stothers, R., Tech, J. L. 1964, Mon. Not. R. astr. Soc, 127, 287.Google Scholar

4. Elvius, T. 1965, Stars and Stellar Systems: Galactic Structure, Vol. V, Chapter 3.Google Scholar

5. Bok, B. J., Basinski, J. M. 1964, Mt Stromlo Obs. Memoirs, no. 16.Google Scholar

6. Upgren, A. R. 1962, Astr, J., 67, 37.Google Scholar

7. Becker, W. 1965, Z. Astrophys., 62, 54.Google Scholar

8. Terzan, A. 1965, Ann. Astrophys., 28, 935.Google Scholar

9. Ljunggren, B. Uppsala Medd., no. 154, 1966; see also, Uppsala Medd., no. 151, 1965.Google Scholar

10. Einasto, J. 1966, Trans. IAU, 12 B, 436.Google Scholar

11. Sanduleak, N. 1964, Doctoral Thesis, Case Inst. of Techn. (unpublished).Google Scholar

12. McCarthy, M. F., Bertiau, F. C., Treanor, P. J. 1964, Ric. Astr. Vatican., 6, 571.Google Scholar

13. Davis Philip, A. G. 1966, Astrophys. J. Suppl., 12, no. 112.Google Scholar

14. Kaftan-Kassim, M. A. 1961, Astrophys. J., 133, 821.Google Scholar

15. Trans. IAU, 1960, 10, 409.Google Scholar

1. Delhaye, J. 1965, Stars and Stellar Systems, 5, 61.Google Scholar

2. Woolley, R. v. d. R. 1965, Stars and Stellar Systems, 5, 85.Google Scholar

3. Eggen, O. J. 1965, Stars and Stellar Systems, 5, 111.Google Scholar

4. Blanco, V. M., 1965, Stars and Stellar Systems, 5, 241.Google Scholar

5. Plaut, L. 1965, Stars and Stellar Systems, 5, 267.Google Scholar

6. Minkowski, R. 1965, Stars and Stellar Systems, 5, 321.Google Scholar

7. Roman, N. G. 1965, Stars and Stellar Systems, 5, 345.Google Scholar

8. Greenstein, J. L. 1965, Stars and Stellar Systems, 5, 361.Google Scholar

9. Luyten, W. J. 1965, Stars and Stellar Systems, 5, 393.Google Scholar

10. Arp, H. C. 1965, Stars and Stellar Systems, 5, 401.Google Scholar

11. Münch, G. 1965, Stars and Stellar Systems, 5, 203.Google Scholar

12. Kerr, F. J., Westerhout, G. 1965, Stars and Stellar Systems, 5, 167.Google Scholar

13. Blaauw, A. 1965, Stars and Stellar Systems, 5, 435.Google Scholar

14. Bok, B. J. 1965, NATO Summer Course, ‘Observational Aspects of Galactic Structure', Part 29, Athens.Google Scholar

15. Perek, L. 1964, Publ. astr. Inst. Czech. Ac. Sci., no. 48, Praha.Google Scholar

16. Byrnes, D. V. 1966, Publ. astr. Soc. Pacif., 78, 46.Google Scholar

17. Boulon, J. 1963, C. r. Acad. Set., Paris, 256, 5280.Google Scholar

18. Boulon, J. 1963, J. Observateurs, 46, 225.Google Scholar

19. Petrie, R. M. 1964, Mon. Not. R. astr. Soc, 128, 245.Google Scholar

20. Howard, W. E. III , Kirk, J. G. Astr. J,, 69, 544, 1964; 70, 434, 1965.Google Scholar

21. Fricke, W. 1966, Besançon Colloquium, ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

22. Wayman, P. A. 1966, Quart, J. R. astr. Soc, 7, 138; Observatory, 86, 185, 1966.Google Scholar

23. Petrie, R. M. 1964, J. R. astr. Soc Can., 58, 34.Google Scholar

24. Feast, M. W. 1963, Mon, Not. R. astr. Soc, 125, 367.Google Scholar

25. Feast, M. W., Shuttleworth, M. 1965, Mon. Not. R. astr. Soc, 130, 243.Google Scholar

26. Rubin, V. C., Burley, J. 1964, Astr. J., 69, 80.Google Scholar

27. Barbier, M. 1966, J. Observateurs, 49, 269.Google Scholar

28. Abt, H. A., Bautz, L. P. 1963, Astrophys. J., 138, 1002.Google Scholar

29. Rubin, V. C. 1965, Astrophys. J., 142, 934.Google Scholar

30. Bonneau, M. 1964, J. Observateurs, 47, 251.Google Scholar

31. Münch, G., Münch, L. 1964, Astrophys. J., 140, 162.Google Scholar

32. Feast, M. W., Thackeray, A. D. 1965, Astrophys. J., 142, 1645.Google Scholar

33. Thackeray, A, D. 1966, Mem. R. astr. Soc, 70, 33.Google Scholar

34. Mirzoyan, L. V., Kazarian, E. S. 1965, Trudy astrofiz. Inst. Alma-Ata, 5, 224.Google Scholar

35. Stibbs, D. W. N. 1964, Publ. R. Obs. Edinburgh, 4, 87.Google Scholar

36. Massonie, J.P. J. Observateurs, 48, 119, 1965;Google Scholar

Thesis, Bull. Inst. Statist. Univ. Paris, 14, 1, 1965.Google Scholar

37. Eggen, O. J. 1965, NATO Summer Course ‘Kinematic and Chemical History of the Galaxy', Herstmonceux.Google Scholar

38. van Wijk, V., Smith, B. F., Daniels, W. E. 1966, Astr.J., 71, 401.Google Scholar

39. Perek, L. 1963, Bull. astr. Inst. Csl., 14, 218.Google Scholar

40. Minkowski, R. 1964, Publ. astr. Soc. Pacif., 76, 197.Google Scholar

41. Feast, M. W. 1966, Man. Not. R. astr. Soc., 132, 495.Google Scholar

42. Schlesinger, B. M. 1966, Publ. astr. Soc. Pacif., 78, 39.Google Scholar

43. Takayanagi, K. 1965, Publ. astr. Soc. Japan, 17, 71.Google Scholar

44. Pavlovskaya, E. D. 1965, Trudy astrofiz. Inst. Alma-Ata, 5, 69.Google Scholar

45. Dahn, C. C. 1964, Publ. astr. Soc. Pacif., 76, 403.Google Scholar

46. Rudnicki, K. 1966, Ada Astr, 16, 335.Google Scholar

47. Murray, C. A. 1967, R. Obs. Bull, (in press).Google Scholar

48. Smak, J. L, Preston, G. W. 1965, Astrophys. J., 142, 943.Google Scholar

49. Woolley, R. v. d. R., Harding, G. A., Cassells, A. I., Saunders, J. 1965, R. Obs. Bull., no. 97.Google Scholar

50. Woolley, R. v. d. R., Aly, K. 1966, R. Obs. Bull., no. 114.Google Scholar

51. Clube, S. V. M. 1967, R. Obs. Bull, (in press).Google Scholar

52. van Herk, G. 1965, Bull. astr. Inst. Netherlds, 18, 71.Google Scholar

53. Eelsalu, H., Jôeveer, M. Tartu Astr. Obs. Publ., 34, 47, 1964; 34, 121, 1964; 35, 49, 1966.Google Scholar

54. Shatsova, R. B., Astr. Zu., 42, 160, 581, 1965 = Sov. Astr., 9, 124, 461, 1966.Google Scholar

55. King, I. 1966, Astr. J., 71, 64.Google Scholar

56. Bouvier, P. 1966, Besançon Colloquium, ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

57. Dzigvashvili, R. M. 1965, Trudy astrofiz. Inst. Alma-Ata, 5, 233.Google Scholar

58. Kennedy, P. M., Przybylski, A. 1963, Mon. Not. R. astr. Soc, 126, 381.Google Scholar

59. Vitrichenko, E. A., Gershberg, R. E., Metik, L. P. 1965, Izv, Krym. astrofiz. Obs., 34, 193.Google Scholar

60. Blaauw, A. 1965, Konikl. Nederl. Akad. Wetenschappen, Verslagen Afd. Natuurkunde, 74, no. 4.Google Scholar

61. Clube, S. V. M. 1967, R. Obs. Bull, (in press).Google Scholar

62. Mouchet, M. T. 1966, Bull, astr., 3e Sér., 1, 87.Google Scholar

63. Martinet, L. 1966, Bull, astr., 3e Sér., 1, 95.Google Scholar

64. Nahon, F. 1963, C. R. Acad. Sci., Paris, 257, 2965, 3305.Google Scholar

65. Massonie, J. P. 1965, Ann. Sci. Univ. Besançon, 3e Sér., Fasc. 4.Google Scholar

66. Massonie, J. P. 1966, C. R. Acad. Sci., Paris, 262, 591, 673.Google Scholar

67. Cayrel, R., Kovalevsky, J. 1964, Astronomic, 78, 437.Google Scholar

68. Cayrel, R. 1965, NATO Summer Course ‘Observational Aspects of Galactic Structure', Parts 25, 26, Athens.Google Scholar

69. Eggen, O. J. 1963, Astr. J., 68, 697.Google Scholar

70. Eggen, O. J. 1964, Astr. J., 69, 570.Google Scholar

71. Strömgren, B. 1964, Astrophys. Norv., 9, 333.Google Scholar

72. Oosterhoff, P. T., Ponsen, I. 1966, Bull. astr. Inst. Netherlds, 18, 150.Google Scholar

73. Kreiken, E. A., Yilmaz, N. 1964, Ann. Astrophys., 27, 672.Google Scholar

73a. Dennis, T. R. 1966, Astrophys. J., 146, 581.Google Scholar

74. Iwanowska, W., Kanthak, J. 1965, Bull. Acad. Pol. Sci., Ser. Sc. Math. Astr. Phys., 13, 155.Google Scholar

75. Iwanowska, W., Boenigk, T. Bull. Acad. Pol. Sci., Ser. Sc. Math. Astr. Phys., 13, 163, 1965; 13, 169, 1965.Google Scholar

76. Boenigk, T. 1965, Bull. Acad. Pol. Sci., Ser. Sc. Math. Astr. Phys., 13, 175.Google Scholar

77. Schmidt-Kaler, T. 1964, Z. Astrophys., 58, 217.Google Scholar

78. Schmidt-Kaler, T. 1965, Astr.J., 70, 147.Google Scholar

79. Shimizu, T., Takahashi, K. 1964, Mem. Coll. Sci., Univ. Kyoto, A 30, no. 3, 333.Google Scholar

80. Shane, W. W., Bieger-Smith, G. P. 1966, Bull. astr. Inst. Netherlds, 18, 263.Google Scholar

81. Burton, W. B. 1966, Bull. astr. Inst. Netherlds, 18, 247.Google Scholar

82. Kerr, F. J. 1964, IAU-URSI Symposium no. 20, Canberra.Google Scholar

83. Braes, L. L. E. 1963, Bull, astr. Inst. Netherlds, 17, 132.Google Scholar

84. Shane, W. W. 1965, NATO Summer Course ‘Kinematic and Chemical History of the Galaxy', Herstmonceux.Google Scholar

85. Locke, J. L., Galt, J. A., Costain, C. H. 1966, Astrophys. J., 139, 1066.Google Scholar

86. Pismis, P. 1965, Bull. Obs. Tonantzintla y Tacubaya, 4, 8.Google Scholar

87. Dixon, E. 1966, Besançon Colloquium, ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

88. Agekyan, T. A., Petrovskaya, I. V., Fesenko, B. I. Astr. Zu., 41, 1027, 1964 = Sov, Astr., 8, 823, 1965; Astrophysika, 1, 373, 1965.Google Scholar

89. Pronik, I. I. Astr. Zu., 42, 923, 1965 = Sov. Astr., 9, 709, 1966.Google Scholar

90. Lindblad, P. O. 1966, Bull astr. Inst. Netherlds, Supply 1, 77, 177.Google Scholar

91. Kerr, F. J. 1965, NATO Summer Course ‘Observational Aspects of Galactic Structure', Parts 25, 26, Athens.Google Scholar

92. Wilhelmsson, H., Winnberg, A. 1963, Astr. Notes, Univ. Gothenburg, no. 8, 20.Google Scholar

93. Rougoor, G. W. 1964, Bull. astr. Inst. Netherlds, 17, 381.Google Scholar

94. Oort, J. H. 1966, IAU-URSI Symposium No. 31, Noordwijk.Google Scholar

95. Lequeux, J. 1966, IAU-URSI Symposium No. 31, Noordwijk.Google Scholar

96. Kerr, F. J. 1965, NATO Summer Course ‘Kinematic and Chemical History of the Galaxy', Herstmonceux.Google Scholar

97. Robinson, B. J., Gardner, F. F., van Damme, K. J., Bolton, J. G. 1964, Nature, 202, 989.Google Scholar

98. Goldstein, S. J. Jr., Gundermann, E. J., Penzias, A. A., Lilley, A. E. 1964, Nature, 203, 65.Google Scholar

99. Bolton, J. G., Gardner, F. F., McGee, P. X., Robinson, B. J. 1964, Nature, 204, 30.Google Scholar

100. Oort, J. H. 1966, Trans. IAU, 12 B, 395, 789.Google Scholar

101. Oort, J. H. 1966, Bull. astr. Inst. Netherlds, 18, 421.Google Scholar

102. Oort, J. H. 1966, IAU-URSI Symposium No. 31, Noordwijk.Google Scholar

103. Oort, J. H. 1966, Ventlesen Award Lecture, Columbia University.Google Scholar

104. Blaauw, A. 1966, IAU-URSI Symposium No. 31, Noordwijk.Google Scholar

105. Blaauw, A., Tolbert, C. R. 1966, Bull. astr. Inst. Netherlds, 18, 405.Google Scholar

106. Muller, C. A., Raimond, E., Schwarz, U. I., Tolbert, C. R. 1966, Bull. astr. Inst. Netherlds, Suppl. 1, 215.Google Scholar

107. Hulsbosch, A. N. M., Raimond, E. 1966, Bull. astr. Inst. Netherlds, 18, 413.Google Scholar

108. Shane, W. W. 1966, IAU-URSI Symposium no. 31, Noordwijk.Google Scholar

109. Habing, H. J. 1966, Bull, astr, Inst. Netherlds, 18, 323.Google Scholar

110. Shklovski, I. S. 1966, IAU-URSI Symposium no. 31, Noordwijk.Google Scholar

111. Dieter, N. H. 1964, Astr. J., 69, 288.Google Scholar

112. Dieter, N. H. 1965, Astr. J., 70, 552.Google Scholar

113. Smith, G. P. 1963, Bull. astr. Inst. Netherlds, 17, 203.Google Scholar

114. Prata, S. W. 1964, Bull. astr. Inst, Netherlds, 17, 511.Google Scholar

1. Oort, J. H. 1965, in Stars and Stellar Systems, 5, 455.Google Scholar

2. Contopoulos, G. (ed.) 1966, The Theory of Orbits in the Solar System and in Stellar Systems, IAU Symposium No. 25, Academic Press.Google Scholar

3. Woltjer, L. 1965, in Stars and Stellar Systems, 5, 531.Google Scholar

4. King, I. 1963, A. Rev. Astr. Astrophys., 1, 179.Google Scholar

5. Wentzel, D. G. 1963, A. Rev. Astr. Astrophys., 1, 195.Google Scholar

6. Contopoulos, G. 1966, Problems of Stellar Dynamics, Proc, Space Math. Seminar, 1, 169, American Mathematical Society.Google Scholar

7. Oort, J., 1965, NATO Summer Course ‘Observational Aspects of Galactic Structure', Part 23, Athens.Google Scholar

8. Prendergast, K., 1966, IAU-URSI Symposium no. 31, Noordwijk.Google Scholar

9. Kuzmin, G. G. 1965, Trudy astrofiz. Inst. Alma-Ata, 5, 11, 70.Google Scholar

10. Kovalevsky, J. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

11. Ogorodnikov, K. F. 1965, Dynamics of Stellar Systems, Pergamon Press.Google Scholar

12. Ollongren, A. 1965, A. Rev. Astr. Astrophys., 3, 113.Google Scholar

13. Ollongren, A. 1965, in Stars and Stellar Systems, 5, 501.Google Scholar

14. Contopoulos, G., Strömgren, B. 1965, Tables of Plane Galactic Orbits, Inst, Space Studies, New York.Google Scholar

15. Woolley, R. v. d. R. 1964, Astrophys. Norv., 9, 261.Google Scholar

16. Perek, L. 1964, Vistas in Astronomy, 5, 28.Google Scholar

17. Genkin, I. L. 1966, Trudy astrofvg. Inst. Alma-Ata, 7, 16.Google Scholar

18. Takayanagi, K. 1965, Publ. astr. Soc. Japan, 17, 71.Google Scholar

19. Nahon, F. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

20. Losco, L. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

21. Perek, L. 1966, Bull. astr. Inst. Csl., 17, 111.Google Scholar

22. Innanen, K. A. 1966, Z. Astrophys., 64, 445, 457.Google Scholar

23. Woolley, R. v. d. R. 1965, NATO, Summer Course ‘Kinematical and Chemical History of the Galaxy', Herstmonceux.Google Scholar

24. Woolley, R. v. d. R. 1967, R. Obs, Bull, (in press).Google Scholar

25. Ogorodnikov, K. F. 1965, Trudy astrofiz. Inst. Alma-Ata, 5, 219.Google Scholar

26. Matsunami, N. 1964, Publ. astr. Sac. Japan, 16, 141.Google Scholar

27. Sherman, N. W., Kinman, D. 1964, Astr, J., 69, 149.Google Scholar

28. Aarseth, S. J. Mon. Not. R. astr. Soc., 126, 223, 1963; 132, 35, 1966.Google Scholar

29. Wielen, R. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

30. Miller, R. H. 1964, Astrophys. J., 140, 250.Google Scholar

31. Hayli, A. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

32. Lindblad, P. O. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

33. van Albada, T. S. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

34. van Albada, T. S. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

35. Worall, G. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures.Google Scholar

36. Aarseth, S. J. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

37. Lecar, M. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

38. Hohl, F., Feix, M. R. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

39. Hénon, M. 1964, Ann. Astrophys., 27, 83.Google Scholar

40. Hénon, M. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

41. Campbell, P. M. 1966, Proc. nat. Acad. Sci., 55, 1.Google Scholar

42. Ulam, S. M., Walden, W. E. 1964, Nature, 201, 1202.Google Scholar

43. Aarseth, S. J., Hoyle, F. 1964, Astrophys, Norv., 9, 313.Google Scholar

44. Hénon, M., Heiles, C. 1964, Astr.J., 69, 73.Google Scholar

45. Hayli, A. 1965, Ann. Astrophys., 28, 49.Google Scholar

46. Aarseth, S. J. 1966, Nature, 212, 57.Google Scholar

47. Barbanis, B. 1966, Astr. J., 71, 415.Google Scholar

48. Contopoulos, G. 1963, Astrophys. J., 138, 1297.Google Scholar

49. Contopoulos, G., Woltjer, L. 1964, Astrophys. J., 140, 1106.Google Scholar

50. Andrle, P. 1966, Bull. astr. Inst. Csl.; 17, 166, 169.Google Scholar

51. Contopoulos, G. 1966, Astrophys. J. Suppl., 13, 503.Google Scholar

52. Contopoulos, G. 1963, Astr. J., 68, 763.Google Scholar

53. Contopoulos, G., Moutsoulas, M. Astr. J., 70, 817, 1966; 71, 687, 1966.Google Scholar

54. Contopoulos, G. 1965, Astr. J., 70, 526.Google Scholar

55. Barbanis, B. 1965, Astr. J., 70, 285.Google Scholar

56. Schmeidler, F. 1963, Astr. Nachr., 287, 1.Google Scholar

57. Kuzmin, G. G. 1964, Tartu astr. Obs, Publ, 34, 457.Google Scholar

58. Idlis, G. M. 1965, Trudy astrofiz. Inst. Alma-Ata, 5, 105.Google Scholar

59. Ogorodnikov, K. F. 1965, Trudy astr. Obs. Leningrad. Univ., 22, 132.Google Scholar

60. Message, J. P. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

61. Nahon, F. 1966, C. R. Acad. Sci., Paris, 262, 669.Google Scholar

62. Gustavson, F. G. 1966, Astr. J., 71.Google Scholar

63. Roels, J. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

64. Hori, G., Liu, T. 1963, Publ. astr. Soc. Japan, 15, 100.Google Scholar

65. Arnol'd, V. I. Uspekhi Mat. Nauk, 18, no. 5 (113), 13, 1963; 18, no. 6 (114), 91, 1963; Sov. Math. Dokl., 161, 331, 1965.Google Scholar

66. Jefferys, W. H. 1966, Astr. J., 71, 306.Google Scholar

67. Moser, J., Jefferys, W. H. 1966, Astr. J., 71, 568.Google Scholar

68. Barrar, R. 1966, Anter. J. Math., 88, 206.Google Scholar

69. Contopoulos, G. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

70. Schmidt, M. 1965, in Stars and Stellar Systems, 5, 513.Google Scholar

71. Innanen, K. A. Astrophys. J., 143, 150, 153, 1966; Z. Astrophys., 64, 158, 1966.Google Scholar

72. Kuzmin, G. G. 1966, Tartu astr. Obs. Publ., 35, 285.Google Scholar

73. Kuzmin, G. G., Kutuzov, S. A. 1966, Tartu astr. Obs. Publ., 35, 316.Google Scholar

74. Genkin, I. L. 1963, Soobšč. gos astr. Inst. Sternberg, no. 129.Google Scholar

75. Genkin, I. L. 1966, Trudy astrofiz. Inst. Alma-Ata, 7, 16.Google Scholar

76. Vandervoort, P. O. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

77. Aoki, S. 1965, Publ. astr. Soc. Japan, 17, 273.Google Scholar

78. Perek, C. 1966, Bull. astr. Inst. Csl, 17, 333.Google Scholar

79. Wallace, J. M., Copeland, J. A. 1964, Publ. astr. Soc. Pacif., 76, 315.Google Scholar

80. Starr, V. P., Newell, R. E. 1963, Publ. astr. Soc. Pacif., 75, 239.Google Scholar

81. Takase, B. 1966, Publ. astr. Soc. Japan (in press).Google Scholar

82. Hodge, P. W. 1966, Proc. astr. Soc. Pacif., 78, 72.Google Scholar

83. Kreiken, E. A. 1964, Observatory, 84, 115.Google Scholar

84. Stothers, R., Tech, J. L. 1964, Mon. Not. R. astr. Soc, 127, 287.Google Scholar

85. Dorschner, J., Gürtler, J., Schmidt, K. H. 1964, Astr. Nachr., 288, 149.Google Scholar

86. Belton, M. J. S., Brandt, J. C. 1963, Ann. Astrophys., 26, 229.Google Scholar

87. Einasto, J. 1964, Comm. Tartu astr. Obs., no. 11, 1.Google Scholar

88. Lequeux, J. 1966, IAU-URSI Symposium no. 31, Noordwijk.Google Scholar

89. Rougoor, G. W. 1966, IAU-URSI Symposium no. 31, Noordwijk.Google Scholar

90. Lynden-Bell, D. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

91. Lynden-Bell, D. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

92. Camm, G. L. 1963, Mon. Not. R. astr. Soc, 126, 283.Google Scholar

93. Hénon, M. 1966, C. R. Acad. Sci., Paris, 262, 666.Google Scholar

94. Hénon, M. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

95. Massonie, J. P. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

96. Prigogine, I., Severne, G. 1966, Physica (in press).Google Scholar

97. Severne, G. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

98. Marochnik, L. S. Astr. Zu., 41, 264, 1964 = Sov. Astr., 8, 202, 1964; Astr. Zu., 43, 560, 919, 1966.Google Scholar

99. Lebedev, V. I., Maksumov, M. N., Marochnik, L. S. Astr. Zu., 42, 709, 1965 = Sov. Astr., 9, 549, 1966.Google Scholar

100. Maskumov, M. N., Marochnik, L. S. Astr. Zu., 42, 1261, 1965 = Sov. Astr., 9, 980, 1966. Dokl. Akad. Nauk SSSR, 164, 1019, 1965.Google Scholar

101. Lynden-Bell, D. 1965, Amer. Math. Soc., Summer Seminar on Relativity Theory and Astrophysics. Google Scholar

102. Antonov, V. A. 1962, Vestnik Leningrad, gos. Univ., no. 19, 96.Google Scholar

103. Arny, T. T. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

104. Simon, R. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

105. Toomre, A. 1964, Astrophys. J., 139, 1217.Google Scholar

106. Toomre, A. 1963, Astrophys. J., 138, 385.Google Scholar

107. Graham, R. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

108. Hunter, C. 1963, Mon. Not. R. astr. Soc, 126, 299; 129, 321, 1965.Google Scholar

109. Sweet, P. A., McGregor, D. D. 1964, Mon. Not. R. astr. Soc, 128, 195.Google Scholar

110. Sweet, P. A., McGregor, D. D. 1964, Observatory, 84, 42.Google Scholar

111. Goldreich, P., Lynden-Bell, D. 1965, Mon. Not. R. astr. Soc, 130, 97.Google Scholar

112. Lynden-Bell, D. 1964, Astrophys. J., 139, 1195.Google Scholar

113. Owaki, N. 1966, Publ. astr. Soc. Japan (in press).Google Scholar

114. Ostriker, J. 1964, Astrophys. J., 140, 1056, 1067, 1529.Google Scholar

115. Lin, C. C. 1966, J. SIAM Appl. Math., 14, 876.Google Scholar

116. Lin, C. C. 1965, Amer. Math. Soc. Seminar on Relativity and Astrophysics, Cornell University.Google Scholar

117. Lin, C. C., Shu, F. H., 1964, Astrophys. J., 140, 646.Google Scholar

118. Lin, C. C., Shu, F. H. 1966, Proc. nat. Acad. Sci., 55, 229.Google Scholar

119. Kalnajs, A. J. 1965, Thesis, Harvard University.Google Scholar

120. Lindblad, B. 1964, Astrophys. Norv., 9, 103.Google Scholar

121. Julian, W. H., Toomre, A. 1966, Astrophys. J., 146, 810.Google Scholar

122. Rehm, R. G. 1965, Thesis, MIT.Google Scholar

123. Goldreich, P., Lynden-Bell, D. 1964, Observatory, 84, 171.Google Scholar

124. Goldreich, P., Lynden-Bell, D. 1965, Mon. Not. R. astr. Soc, 130, 125.Google Scholar

125. Lynden-Bell, D. 1965, NATO Summer Course ‘Kinematical and Chemical History of the Galaxy', Herstmonceux.Google Scholar

126. Prendergast, K. 1966, IAU-URSI Symposium no. 31, Noordwijk.Google Scholar

127. Buggish, H., Kahn, F. D. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

128. Helfer, H. L. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

129. Contopoulos, G. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

130. Lyttleton, R. A., Bondi, H. 1963, Mon. Not. R. astr. Soc, 128, 207.Google Scholar

131. Lynden-Bell, D. 1966, Observatory, 86, 57.Google Scholar

132. Lynden-Bell, D. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

133. Freeman, K. C., Mestel, L. 1966, Mon. Not. R. astr. Soc, 134, 37.Google Scholar

134. Pacholczyk, A. G. 1963, Acta Astr., 13, 1.Google Scholar

135. Stodolkiewicz, J. S. 1963, Acta Astr., 13, 30.Google Scholar

136. Graham, R. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

137. Pikel'ner, S. B. 1965, Astr. Zu., 42, 515 = Sov. Astr., 9, 408, 1965.Google Scholar

138. Fujimoto, M. 1963, Set. Rep. Tohoku Univ. (Sendai), Ser. 1, 47, 165.Google Scholar

139. Ôki, T., Fujimoto, M., Hitotuyanagi, Z. 1965, Suppl. Progr. Theor. Physics, no. 31, 77.Google Scholar

140. Fujimoto, M. 1965, Publ. astr. Soc. Japan, 17, 231.Google Scholar

141. Setti, G. 1966, Bull. astr. Inst. Netherlds, 18, 51.Google Scholar

142. Hornby, J. M. 1966, Mon. Not. R. astr. Soc, 133, 213.Google Scholar

143. Stepien, K., 1964, Acta Astr., 14, 81.Google Scholar

144. Greyber, H. D. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

145. Pratap, R. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

146. Sakakibara, S. 1965, J. Geomagn. Geoelectricity, 17, 99.Google Scholar

147. Woltjer, L. 1964, 13th Solvay Conference, Brussels.Google Scholar

148. van de Hulst, H. C. 1966, IAU-URSI Symposium no. 31, Noordwijk.Google Scholar

149. Davies, R. D., de Jager, G., Verschuur, G. L. 1966, Nature, 209, 974.Google Scholar

150. Downes, D., Maxwell, A. 1966, IAU-URSI Symposium no. 31, Noordwijk.Google Scholar

151. Burbidge, G. R., Hoyle, F. 1963, Astrophys. J., 138, 57.Google Scholar

152. Lequeux, J. 1963, Ann. Astrophys., 26, 429.Google Scholar

153. Ishida, K. 1964, Suppl. Progr. Theor. Physics, no. 31, 116.Google Scholar

154. Pikel'ner, S. B., 1966, IAU-URSI Symposium no. 31, Noordwijk.Google Scholar

155. Spitzer, L., Saslaw, W. C. 1966, Astrophys. J., 143, 400.Google Scholar

156. Ginzburg, V. L., Syrovatskii, S. I. 1964, The Origin of Cosmic Rays, Pergamon Press.Google Scholar

157. Rosen, S. 1966, 14th Liège Symposium, Gravitational Instability and the Formation of Stars and Galactic Structures. Google Scholar

158. Mestel, L. 1963, Mon. Not. R. astr. Soc., 126, 553.Google Scholar

159. Lin, C. C., Mestel, L., Shu, F. H. 1965, Astrophys. J., 142, 1431.Google Scholar

160. Grzedzielski, S. 1966, Mon. Not. R. astr. Soc, 134, 109.Google Scholar

161. Milder, M. 1966, Astrophys. J., 145, 109.Google Scholar

162. Camm, G. L. 1966, Besançon Colloquium ‘Nouvelles Méthodes de la Dynamique Stellaire'.Google Scholar

163. King, I. 1965, Astr. J., 70, 296.Google Scholar

164. Genkin, I. L., 1965, Trudy astrofiz. Inst. Alma-Ata, 5, 23.Google Scholar

165. Kuzmin, G. G. 1964, Tartu astr. Obs. Publ, 34, 9.Google Scholar

166. Kitamura, S. 1966, J. astr, Soc. Japan, 18, 317.Google Scholar

167. Lynden-Bell, D. 1965, Mon. Not. R. astr. Soc, 129, 299.Google Scholar

168. Avner, E. S. 1965, Dissert. Abstr., 26, 27.Google Scholar

1. Blaauw, A., Elvius, T. 1965, Stars and Stellar Systems, Gen. eds. Kuiper, G. and Middlehurst, B., Vol. 5, Galactic Structure. Eds. Blaauw, A. and Schmidt, M., 589, University of Chicago Press, Chicago.Google Scholar

2. Brun, A., Vehrenberg, H. 1965, Atlas of Harvard-Groningen Selected Areas, Treugesell-Verlag, Düsseldorf.Google Scholar

3. Kharadze, E. K., Apriamashvili, S. P., Kotchlasvili, T. A. 1964, Abastumani astrophys, Obs. Bull., 31, 3.Google Scholar

4. Apriamashvili, S.P. 1964, ibid, 31, 27.Google Scholar

5. Kalandadze, N. B. 1964, ibid., 31, 66.Google Scholar

6. Apriamashvili, S. P., Kuznetsov, V. I. 1966, ibid., 35.Google Scholar

7. Kalandadze, N. B. 1966, ibid., 35, andGoogle Scholar

8. Chuadze, A. D. 1966, ibid., 35.Google Scholar

9. Cousins, A. W. J., Stoy, R. H. 1963, R. Obs. Bull., no. 64.Google Scholar

10. Nekrasova, S. V., Nikonov, V. B., Rybka, E. 1965, Izv. Krym. astrofiz. Obs., 34, 69.Google Scholar

11. Urasin, L. 1965, Bull. astr. Obs. Engelhardt (Kazan), 38, 47.Google Scholar

12. Urasin, L. 1966, Izv. astr. Obs. Engelhardt (Kazan), no. 35.Google Scholar

13. Bigay, J. H., Lunel, M. 1965, C.R. Acad. Set., Paris, 260, 3853.Google Scholar

14. Bigay, J. H., Lunel, M. 1965, J. Observateurs, 48, 171 = Publ. Obs. Hte-Provence, 8, no. 7.Google Scholar

15. Bigay, J. H., 1966, C.R. Acad. Sci. Paris, 262 Ser. A-B, 1570 = Publ. Hte-Provence, 8, no, 28.Google Scholar

16. Bigay, J. H. 1966, ibid., 263 Ser. A-B, 214 = Publ. Hte-Provence, 8, no. 29.Google Scholar

17. Terzan, A. 1965, Ann. Astrophys., 28, 935 = Publ. Obs. Hte-Provence, 8, no, 12.Google Scholar

18. Terzan, A. 1966, J. Observateurs, 49, 225 = Publ. Obs. Hte-Provence, 8, no. 12 vis.Google Scholar

19. Voroshilov, V. I. 1966, Problems of astrophysics, 136. ‘Naukova Dumka', Kiev.Google Scholar

20. Fedorchenko, G. L. 1964, Investigations of the physics of stars and diffuse matter, 63. 'Naukova Dumka', Kiev.Google Scholar

21. Lyngå, G. 1964, Acta Univers. Lund, Sect. II, no. 11 = Medd. Lunds Obs., Ser. II, no. 139.Google Scholar

22. Bok, B.J., Basinsky, J. 1964, Mem. Mt Stromlo Obs., no. 16.Google Scholar

22a. Brodskaya, E. S., Grigorieva, N. B. 1964, Soobšč. gas. astr. Inst. Sternberga (Moskva), no. 136.Google Scholar

23. Westerlund, B. 1965, Mon. Not. R. astr. Soc, 130, 45 = Mt Stromlo Obs. Repr., no. 116.Google Scholar

24. Albo, H. 1964, Tartu astr. Obs. Publ., 34, 169.Google Scholar

25. Azzopardi, , Bouigue, R. 1965, J. Observateurs. Google Scholar

26. Pfleiderer, J., Dachs, J., Haug, U. 1966, Z. Astrophys., 64, 116 = Mitt. astr. Inst. Tübingen, no. 88.Google Scholar

27. Elvius, T., Häggkvist, L. 1966, Ark. Astr., 4, no. 3 = Uppsala astr. Obs. Medd., no. 152.Google Scholar

28. Oja, T. 1966, Nova acta reg. soc. sci. Upsal., Ser. IV, 19, no. 3 = Uppsala astr. Obs. Ann., 2, no. 4.Google Scholar

29. Elvius, T., Lyngå, G. 1965, Ark. Astr., 3, no. 32 = Uppsala astr. Obs. Medd., no. 149.Google Scholar

30. McCuskey, S. W. 1964, Astr. J., 69, 104 = Warner and Swasey Obs. Repr., no. 128.Google Scholar

31. Davis Philip, A. G. 1966, Astrophys. J. Suppl., 12, 391 = Warner and Swasey Obs. Repr., no. 142.Google Scholar

32. Harris, D. L. III., Upgren, A. R. 1964, Astrophys. J,, 140, 151 = U.S. nav. Obs. Washington Repr., no. 52.Google Scholar

33. Priser, J. B. 1966, Publ. astr. Soc. Pacific, 78, 474, U.S. Naval Obs. Washington, Repr., no. 79.Google Scholar

34. Wachmann, A. A. Astr. Abh. Hamburg. Sternw., 6, no. 1, 1961; no. 2, 1963; no. 3, 1964; no. 4, 1966.Google Scholar

35. Wachmann, A. A. ibid., 7, no. 3 and 4, 1964; no. 7, 1966.Google Scholar

35a. Olmsted, M. 1966, Astr. J., 71, 916.Google Scholar

36. Terzan, A. 1965, C. R. Acad. Sci. Paris, 261, 3974 = Publ. Obs. Hte-Provence, 8, no. 11.Google Scholar

37. Terzan, A. 1966, J. Observateurs, 49, 258 = Publ. Obs. Hte-Provence, 8.Google Scholar

38. Kinman, T. D., Wirtanen, C. A., Janes, K. A. 1966, Astrophys. J. Suppl., 13, 279 = Contr. Lick Obs., no. 202.Google Scholar

39. van Schewick, H. 1966, Veröff. Univ. Sternw. Bonn, no, 74.Google Scholar

40. van Schewick, H. 1966, ibid., no. 76.Google Scholar

41. Heard, J. F. 1965, Publ. David Dunlap Obs. Univ. Toronto, 2, no. 16.Google Scholar

42. Fehrenbach, Ch., Duflot, M., Boulon, J., Rebeirot, E., Lanoë, C. 1966, J. Observateurs, 49, 155, 158, 165, 176, 194, and 205 = Publ. Obs. Hte-Provence, 8, no. 25.Google Scholar

43. Barbier, M. 1966, J. Observateurs, 48, 149, and 49, 290, = Publ, Obs, Hte-Provence, 8, no. 5 and no. 30, 23.Google Scholar

44. Barbier, M. 1966, J. Observateurs, 49, 269 = Publ. Obs. Hte-Provence, 8, no. 30, 1.Google Scholar

45. Martin, N. 1964, J. Observateurs, 47, 125 = Publ. Obs. Hte-Provence, 7, no. 33.Google Scholar

46. Voroshilov, I. I. 1966, Physics of stars and interstellar medium, 92. ‘Naukova Dumkd’ Kiev.Google Scholar

47. Appenzeller, I. 1966, Z. Astrophys., 64, 19 = Veröff. Univ. Sternw. Göttingen, no. 144.Google Scholar

48. Becker, W. 1965, Z. Astrophys., 62, 54 = Mitt, astr-meteor. Anst. Univ. Basel, no. 40.Google Scholar

49. Elvius, T. 1965, Stars and Stellar Systems, 5, Galactic Structure. Eds. Blaauw, A. and Schmidt, M., 41, University of Chicago Press, Chicago.Google Scholar

50. Kolesnik, L. N. 1964, Investigations of the physics of stars and diffuse matter, 52. ‘Naukova Dumka', Kiev.Google Scholar

51. Fedorchenko, G. L. 1966, Problems of astrophysics, 169. ‘Naukova Dumka', Kiev.Google Scholar

52. Parenago, P. P. 1956, Astr. Zu., 33, 749. See also IAU Symp., no. 7, 61, 1959.Google Scholar

53. McCuskey, S. W. 1965, Stars and Stellar Systems, Gen. eds. Kuiper, G. and Middle-hurst, B., 5: Galactic Structure, Eds. Blaauw, A. and M., Schmidt, 1, University of Chicago Press, Chicago.Google Scholar

54. Trans. IAU, 12A, 554, ref. 5, 1965.Google Scholar

55. Trans. IAU, 12A, 554, ref. 11 and 12, 1965.Google Scholar

56. Trans. IAU, 12A, 554, ref. 9a, 1965.Google Scholar

57. Trans. IAU, 12A, 554, ref. 9c, 1965.Google Scholar

58. Trans. IAU, 9, 472, ref. 62, 1955.Google Scholar

59. O'Connell, D. J. K. 1965, Ann. rep. Vatican Obs..Google Scholar

60. Trans, IAU, 9, 470, ref. 16, 1957.Google Scholar

61. Trans. IAU, 9, 471, ref. 36, 1957.Google Scholar

62. Trans. IAU, 12A, 554, ref. 29-31, 1965.Google Scholar

63. Öhman, Y. 1930, Medd. Astr. Obs. Uppsala, no. 48.Google Scholar

64. Fehrenbach, Ch. 1958, Handbuch Physik, Ed. Flügge, S., 50, 25. Springer Verl., Berlin.Google Scholar

65. Trans. IAU, 12A, 534, ref. 10, 1965.Google Scholar

66. Becker, W. 1966, IAU Symp., no. 24, 358.Google Scholar

67. Trans. IAU, 11A, 397, ref. 8, 1962.Google Scholar