Akiskal, H. S., and McKinney, W. T. (1973) Depressive disorders: toward a unified hypothesis. Science 183:20–29. [HA]CrossRefGoogle Scholar

Akiskal, H. S., and McKinney, W. T. (1975) Overview of recent research in depression. Integration of ten conceptual models into a comprehensive clinical frame. Archives of General Psychiatry 32:285–305. [HA]Google Scholar

Alexander, R. D. (1979) Evolution and culture. In Evolutionary biology and human social behavior: an anthropological perspective, ed. Chagnon, N. A. and Irons, W.. North Scituate, Mass.: Duxbury Press. [DdC]Google Scholar

Anisman, H. (1978) Neurochemical changes elicited by stress: behavioral correlates. In Psychopharmacology of aversively motivated behavior, ed. Anisman, H. and Bignami, G.. New York: Plenum Press. [HA]Google Scholar

Anisman, H.; Pizzino, A.; and Sklar, L. S. (1980, in press) Coping with stress, norepinephrine depletion and escape performance. Brain Research. [HA]Google Scholar

Bachman, J. (1972) Self-injurious behavior: a behavioral analysis. Journal of Abnormal Psychology 80:211–24. [DdC]Google Scholar

Baechler, Jean. (1979) Suicides. Trans. Cooper, Barry. New York: Basic Books. Originally published in 1975 as Les suicides. Paris: Caemann-Lëvy. [JDD]Google Scholar

Bandura, A. (1971) Psychological modeling. Chicago: Aldine-Atherton. [DdC]Google Scholar

Barash, D. P. (1977) Sociobiology and behavior. New York: Elsevier. [DdC]Google Scholar

Barchas, J. D.; Akil, H.; Elliott, G. R.; Holman, R. B.; and Watson, S. J. (1978) Behavioral neurochemistry: neuroregulators and behavioral states. Science 200:964–73. [DdC]CrossRefGoogle ScholarPubMed

Batchelor, I. R. C. and Napier, M. B. (1953) Broken homes among attempted suicides. British Journal of Delinquency 4:99. [DdC]Google Scholar

Beck, A. T. (1967) Depression: clinical, experimental and theoretical aspects. New York: Harper and Row. [DdC]Google Scholar

Beck, A. T. (1972) Depression: cause and treatment. Philadelphia: University of Pennsylvania Press. [RDW]Google Scholar

Beck, A. T. (1976) Cognitive therapy and the emotional disorders. New York: International Universities Press. [RDW]Google Scholar

Beck, A. T.; Kovacs, M.; and Weissman, A. (1975) Hopelessness and suicidal behavior: an overview. Journal of the American Medical Association 234:1146–49. [DdC, RDW]CrossRefGoogle ScholarPubMed

Beck, A. T.; Rush, A. J.; Shaw, B. F.; and Emery, G. (1979) Cognitive therapy of depression. New York: The Guilford Press. [RDW]Google Scholar

Blest, A. D. (1963) Longevity, payability and natural selection in five species of New World Saturniid moth. Nature 197:1183–86. [WJH]Google Scholar

Bogard, H. M. (1971) Collected thoughts of a suicidologist. In Identifying suicide potential, ed. Anderson, D. B. and McClean, L. J.. New York: Behavioral Publications. [DdC]Google Scholar

Breed, W. (1966) Suicide, migration, and race. Journal of Social Issues 22:30–43. [DdC]CrossRefGoogle Scholar

Breed, W. (1972) Five components of a basic suicide syndrome. Life-Threatening Behavior 2:3–18. [DdC]Google Scholar

Carlson, N. R. (1977) Physiology of behavior. Boston: Allyn and Bacon. [DdC]Google Scholar

Carr, E. G. (1977) The motivation of self-injurious behavior: a review of some hypotheses. Psychological Bulletin 84:800–816. [DdC]Google Scholar

Caspari, E. (1967) Gene action as applied to behavior. In Behavior - genetic analysis, ed. Hirsch, J.. New York: McGraw-Hill. [DdC]Google Scholar

Chagnon, N. A. (1979) Mate competition, favoring close kin, and village fissioning among the Yanomamö Indians. In Evolutionary biology and human social behavior: an anthropological perspective, ed. Chagnon, N. A. and Irons, W.. North Scituate, Mass.: Duxbury Press. [DdC]Google Scholar

Clough, G. C. (1965) Lemmings and population problems. American Scientist 53:199–212. [DdC, WJH]Google Scholar

Conner, R. L. (1972) Hormones, biogenic amines, and aggression. In Hormones and behavior, ed. Levine, S.. New York: Academic Press. [DdC]Google Scholar

Daly, M., and Wilson, M. (1978) Sex, evolution, and behavior. North Scituate, Mass.: Duxbury Press. [DdC]Google Scholar

Dawkins, R. (1976) The selfish gene. New York: Oxford University Press. [DdC]Google Scholar

Dawkins, R. (1979) Twelve misunderstandings of kin selection. Zeitschrift für Tierpsychologie 51:184–200. [RD, DSW]CrossRefGoogle Scholar

deCatanzaro, D. (1978) Self-injurious behavior: a biological analysis. Motivation and Emotion 2:45–65. [DdC]Google Scholar

deCatanzaro, D. (1979) A reinterpretation of self-injurious behavior: a synergism of learning, physiological, and sociobiological factors. Manuscript submitted for publication. [DdC]Google Scholar

deCatanzaro, D., and Baldwin, G. (1978) Effective treatment of self-injurious behavior through a forced arm exercise. American Journal of Mental Deficiency 82:433–39. [DdC]Google ScholarPubMed

deCatanzaro, D., and Gorzalka, B. B. (1979) Stress and male sexual behavior. Manuscript submitted for publication. [DdC]Google Scholar

Demographic Yearbook-1976. (1977) New York: United Nations. [DdC]Google Scholar

deVos, G. A. (1968) Suicide in cross-cultural perspective. In Suicidal behaviors, ed. Resnik, H. L. P.. Boston: Little Brown and Co. [DdC]Google Scholar

Diggory, J. C. (1976) United States suicide rates, 1933–1968: an analysis of some trends. In Suicidology: contemporary developments, ed. Shneidman, E. S.. New York: Grune & Stratton. [DdC]Google Scholar

Dorpat, T. I.; Anderson, W. F.; and Ripley, H. S. (1968) The relationship of physical illness to suicide. In Suicidal behaviors, ed. Resnik, H. L. P.. Boston: Little Brown and Co. [DdC]Google Scholar

Douglas, Jack D., The social meanings of suicide. Princeton, N. J.: Princeton University Press. [JDD]CrossRefGoogle Scholar

Douglas, Jack D. (1971) American social order. New York: Free Press. [JDD]Google Scholar

Dublin, L. (1963) Suicide. New York: Ronald. [DdC]Google Scholar

Dublin, L., and Bunzel, B. (1933) To be or not to be. New York: Harrison Smith and Robert Haas. [DdC]Google Scholar

Durham, W. H. (1979) Toward a coevolutionary theory of human biology and culture. In Evolutionary biology and human social behavior: an anthropological perspective, ed. Chagnon, N. A. and Irons, W.. North Scituate, Mass.: Duxbury Press. [DdC]Google Scholar

Durkheim, E. (1951) Suicide. Glencoe, Ill.: Free Press. [DdC, LDH]Google Scholar

Farber, M. L. (1968) Theory of suicide. New York: Funk & Wagnalls. [DdC, MLF]Google Scholar

Farber, M. L. (1977) Factors determining the incidence of suicide within families. Suicide and Life-Threatening Behavior 7:3–6. [DdC]Google Scholar

Farberow, N. L. (1972) Cultural history of suicide. In Suicide and attempted suicide, ed. Waldenstrom, J., Larsson, T. and Ljungstedt, N.. Stockholm: Nordiska Bokhandelns Forlag. [DdC]Google Scholar

Farberow, N. L. ed. (1975) Suicide in different cultures. Baltimore: University Park Press. [DdC]Google Scholar

Ferrence, R. C; Jarvis, G. K.; Johnson, F. G.; and Whitehead, P. C. (1975) The self-injury patient: sociological and medical profiles and implications for prevention. In Self-destructive behavior, ed. Roberts, A. R.. Springfield, Ill.: Charles C. Thomas. [DdC]Google Scholar

Freud, S. (1924) Beyond the pleasure principle. New York: Boni and Live-right. [DdC]Google Scholar

Frieden, G. (1978) Masochistic behavior as an outcome of role confusion. Ph.D. dissertation. University of Southern California. [GF]Google Scholar

Frieden, G., and Fraser, S. C. (1978) Inducing masochistic behavior: the pain of feeling low. Paper presented at a meeting of the Western Psychological Association, San Francisco. [GF]Google Scholar

Gallistel, C. R. (1973) Self-stimulation: the neurophysiology of reward and motivation. In The physiological basis of memory, ed. Deutsch, J. A.. New York: Academic Press. [DdC]Google Scholar

Ganzler, S. (1967) Some interpersonal and social dimensions of suicidal behavior. Dissertation Abstracts 28B: 1192–93. [DdC]Google Scholar

Gershon, E. S. (1978) The search for genetic markers in affective disorders. In Psychopharmacology: a generation of progress, ed. Lipton, M. A., Di-Mascio, A., and Killam, K. F.. New York: Raven Press. [HA]Google Scholar

Gershon, E. S.; Bunney, W. E. Jr; Leckman, J. F.; Van Eerdewegh, M.; and DeBauche, B. A. (1976) The inheritance of affective disorders: a review of data and of hypotheses. Behavior Genetics 6:227–61. [DdC]CrossRefGoogle ScholarPubMed

Ghiselin, M. T. (1974) The economy of nature and the evolution of sex. Berkeley: University of California Press. [DSW]Google Scholar

Goodall, J. (1979) Life and death at Combe. National Geographic 155:592–621. [DdC]Google Scholar

Gorzalka, B. B., and Mogenson, G. J. (1977) Sexual behavior. In The neurobiology of behavior: an introduction, ed. Mogenson, G. J.. Hillsdale, N.J.: Lawrence Erlbaum Associates. [DdC]Google Scholar

Hamilton, W. D. (1964) The genetical evolution of social behavior. Journal of Theoretical Biology 7:1–16. [DdC]CrossRefGoogle Scholar

Hamilton, W. D. (1970) Selfish and spiteful behaviour in an evolutionary model. Nature 228:1218–20. [DdC]Google Scholar

Hamilton, W. D. (1971) Selection of selfish and altruistic behavior in some extreme models. In Man and beast: comparative social behavior, ed. Eisenberg, J. F. and Dillon, W. S.. Washington, DC: Smithsonian Institution. [DdC]Google Scholar

Honkoff, L. D. (1961) An epidemic of attempted suicide. Comprehensive Psychiatry 2:294–98. [DdC]CrossRefGoogle Scholar

Headley, L. (1975) Jewish suicide in Israel. In Suicide in different cultures, ed. Farberow, N. L.. Baltimore: University Park Press. [DdC]Google Scholar

Hellon, C. P., and Solomon, M. I. (in press) Suicide and age in Alberta, 1951–1977: a cohort analysis. Archives of General Psychiatry. [RDW]Google Scholar

Hendin, W. (1976). Growing up dead: student suicide. In Suicidology: contemporary developments, ed. Shneidman, E. S.. New York: Grune & Stratton. [DdC]Google Scholar

Henry, A. F., and Short, J. F. (1954) Suicide and homicide. New York: Free Press. [DL]Google Scholar

Herskowitz, I. H. (1973) Principles of genetics. New York: Macmillan. [DdC]Google Scholar

Hinde, R. A., and Stevenson-Hinde, J., eds. (1973) Constraints on learning. New York: Academic Press. [DdC]Google Scholar

Irons, W. (1979) Natural selection, adaptation, and human social behavior. In Evolutionary biology and human social behavior: an anthropological perspective, ed. Chagnon, N. A. and Irons, W.. North Scituate, Mass.: Duxbury Press. [DdC]Google Scholar

Jacobs, J. (1971) Adolescent suicide. New York: Wiley. [DdC]Google Scholar

Jonas, A. D., and Jonas, D. F. (1975) An evolutionary context for schizophrenia. Schizophrenia Bulletin 2:33–41. [DL]CrossRefGoogle Scholar

Kalela, O. (1962) On the fluctuations of the numbers of arctic and boveal small rodents as a problem of production biology. Annales Academiae Scientarum Fennicae A IV, 66:1–38. [WJH]Google Scholar

Kallman, F. J. (1949) Suicide in twins and only children. American Journal of Human Genetics 1:113–26. [DdC]Google Scholar

Kaplan, H. B., and Pokorny, A. D. (1976) Self-attitudes and suicidal behavior. Suicide and Life-Threatening Behavior 6:23–25. [DdC, GF]Google Scholar

Kiev, A. (1977) The suicidal patient: recognition and management. Chicago: Nelson-Hall. [DdC]Google Scholar

King, M. C., and Wilson, A. C. (1975a) Evolution at two levels in humans and chimpanzees. Science 188:107–16. [DdC]CrossRefGoogle ScholarPubMed

King, M. C., and Wilson, A. C. (1975b) Our close cousin, the chimpanzee. New Scientist 67:16–18. [DdC]Google Scholar

Kreitman, N. (1977) Parasuicide. New York: Wiley. [DdC]Google Scholar

Kvetňanský, R.; Mitro, A.; Palkovits, M.; Brownstein, M.; Torda, T.; Vigas, M.; and Mikulaj, L. (1976) Catecholamines in individual hypothalamic nuclei in stressed rats. In Catecholamines and stress, ed. Usdin, E., Kveňanský, R., and Kopin, I. J.. Oxford: Pergamon Press. [HA]Google Scholar

Laing, R. D. (1967) The politics of experience. New York: Ballantine. [DL]Google Scholar

Leese, S. M. (1969) Suicide behavior in twenty adolescents. British Journal of Psychiatry 115:479–80. [DdC]Google Scholar

Lesch, M., and Nyhan, W. L. (1964) A familial disorder of uric acid metabolism and central nervous system function. American Journal of Medicine 36:561. [DdC]Google Scholar

Lester, D. (1968) Note on the inheritance of suicide. Psychological Reports 22:320. [DdC]CrossRefGoogle Scholar

Lester, D. (1972) Why people kill themselves. Springfield, Ill.: Charles C. Thomas. [DdC, MPD, DL]Google Scholar

Lester, D. (1977) Bereavement and suicide: a positive perspective. In Suicide and bereavement, ed. Danto, B. L. and Kutscher, A. H., pp. 194–98. New York: MSS. [DL]Google Scholar

Levenson, M. (1974) Cognitive correlates of suicidal risk. In Psychological assessment of suicidal risk, ed. Neuringer, C.. Springfield, Ill.: Charles C. Thomas. [DdC, RDW]Google Scholar

Levine, S. (1976) Stress and behavior. In Progress in psychobiology, ed. Thompson, R. F.. San Francisco: W. H. Freeman and Company. [DdC]Google Scholar

Levins, R. (1968) Evolution in changing environments. Princeton, N.J.: Princeton University Press. [DSW]Google Scholar

Linden, L. L., and Breed, W. (1976) The demographic epidemiology of suicide. In Suicidology: contemporary developments, ed. Shneidman, E. S.. New York: Grune & Stratton. [DdC]Google Scholar

Lingens, E. (1972) Suicide in extreme situations. In Suicide and attempted suicide, ed. Waldenstrom, J., Larsson, T. and Ljungstedt, N.. Stockholm: Nordiska Bokhandelns Forlag. [DdC]Google Scholar

McCulloch, J. W., and Philip, A. E. (1972) Suicidal behavior. New York: Pergamon Press. [DdC]Google Scholar

Maynard Smith, J. (1964) Group selection and kin selection. Nature 20:1145–47. [DdC]Google Scholar

Maynard Smith, J. (1978) The evolution of behavior. Scientific American 239:176–92. [DdC]CrossRefGoogle Scholar

Mayr, E. (1963) Populations, species, and evolution. Cambridge, Mass.: Harvard University Press. [DSW]CrossRefGoogle Scholar

Medawar, P. B. (1957) The uniqueness of the individual. London: Methuen. [DdC]Google Scholar

Menninger, K. (1938) Man against himself. New York: Harcourt, Brace, and World. [DdC]Google Scholar

Minkoff, K., Bergman, E., Beck, A. T., and Beck, R. (1973) Hopelessness, depression, and attempted suicide. American Journal of Psychiatry 130:455–459. [RDW]Google Scholar

Modigh, K. (1976) Influence of social stress on brain catecholamine mechanisms. In Catecholamines and stress, ed. Usdin, E., Kvetňanský, R. and Kopin, I. J.. Oxford: Pergamon Press. [HA]Google Scholar

Mogenson, G. J., and Phillips, A. G. (1976) Motivation: a psychological construct in search of a physiological substrate. In Progress in psychobiology and physiological psychology, vol. 6, ed. Sprague, J. M. and Epstein, A. N.. New York: Academic Press. [DdC]Google Scholar

Murphy, D. L.; Campbell, I.; and Costa, J. L. (1978) Current status of the indoleamine hypothesis of the affective disorders. In Psychopharmacology: a generation of progress, ed. Lipton, M. A., DiMascio, A. and Killam, K. F.. New York: Raven Press. [HA, DdC]Google Scholar

Murphy, G. E., and Wetzel, R. D. (in press) Suicide risk by birth cohort in the United States, 1949–1974. Archives of General Psychiatry. [RDW]Google Scholar

Neuringer, C. (1962) Methodological problems in suicide research. Journal of Consulting Psychology 26:273–78. [DdC]Google Scholar

Neuringer, C. (1968) Divergencies between attitudes toward life and death among suicidal psychosomatic and normal hospital patients. Journal of Consulting and Clinical Psychology 32:59–63. [RDW]Google Scholar

Neuringer, C. (1973) Attitude toward self in suicidal individuals. Life-Threatening Behavior 4:96–106. [RDW]Google Scholar

Neuringer, C. (1974) Self and other appraisals by suicidal psychosomatic and normal hospitalized patients. Journal of Consulting Clinical Psychology 42:306. [RDW]CrossRefGoogle ScholarPubMed

Neuringer, C. (1976) Current developments in the study of suicidal thinking. In Suicidology: contemporary developments, ed. Shneidman, E. S.. New York: Grune & Stratton. [DdC, RDW]Google Scholar

Neuringer, C., and Lettieri, D. J. (1971) Cognitions, attitudes and affect in suicidal individuals. Life-Threatening Behavior 1:106–24. [RDW]Google Scholar

Nevin, J. A., and Reynolds, G. S., eds. (1973) The study of behavior. Glenview, Ill.: Scott, Foresman, and Company. [DdC]Google Scholar

Osmond, H., and Hoffer, A. (n.d.) A comprehensive theory of schizophrenia. [DL]Google Scholar

Otto, U. (1972) Suicidal behaviour in childhood and adolescence. In Suicide and attempted suicide, ed. Waldenstrom, J., Larsson, T. and Ljungstedt, N.. Stockholm: Nordiska Bokhandelns Forlag. [DdC]Google Scholar

Pare, C. M. B., and Mack, J. W. (1971) Differentiation of two genetically specific types of depression by the response to anti-depressants. Journal of Medical Genetics 8:306. [DCB]Google Scholar

Parker, C. E. (1978) Selfish genes, evolutionary games, and the adaptiveness of behaviour. Nature 274:849–55. [DdC]CrossRefGoogle ScholarPubMed

Phillips, D. P. (1974) The influence of suggestion on suicide: substantive and theoretical implications of the Werther effect. American Sociological Review 39:340–54. [DdC]CrossRefGoogle ScholarPubMed

Pokorny, A. D. (1974) A scheme for classifying suicidal behaviors. In The prediction of suicide, ed. Beck, A. T., Resnik, H. L. P. and Lettieri, D. J.. Bowie, Md.: Charles Press. [DdC]Google Scholar

Renner, K. E., and Tinsley, J. B. (1976) Self-punitive behavior. In The psychology of learning and motivation - advances in research and theory, ed. Bower, G. H., pp. 155–98. New York: Academic Press. [GF]Google Scholar

Richman, J. (1971) Family determinants of suicide potential. In Identifying suicide potential, ed. Anderson, D. B. and McClean, L. J.. New York: Behavioral Publications. [DdC]Google Scholar

Ridley, M., and Dawkins, R. (in press) The natural selection of altruism. In Altruism and helping behaviour, ed. Rushton, J. P. and Sorrentino, R. M.. Hillsdale, N.J.: Lawrence Erlbaum Associates. [RD]Google Scholar

Ritter, S., and Pelzer, N. L. (1978) Magnitude of stress-induced brain norepinephrine depletion varies with age. Brain Research 152:170. [HA]CrossRefGoogle ScholarPubMed

Roberts, A. R., ed. (1975) Self-destructive behavior. Springfield, Ill.: Charles C. Thomas. [DdC]Google Scholar

Sainsbury, P. (1955) Suicide in London. London: Chapman & Hall. [DdC, RDW]Google Scholar

Schildkraut, J. J. (1978) Current status of the catecholamine hypothesis of affective disorders. In Psychopharmacology: a generation of progress, ed. Lipton, M. A., DiMascio, A. and Killam, K. F.. New York: Raven Press. [HA]Google Scholar

Schildkraut, J. J., and Kety, S. S. (1967) Biogenic amines and emotion. Science 156:21–30. [DdC]CrossRefGoogle ScholarPubMed

Schneider, E. V. (1953) Sociological concepts and psychiatric research. In Interrelations between the social environment and psychiatric disorder. New York: Milbank Memorial Fund. [DdC]Google Scholar

Selye, H. (1973) The evolution of the stress concept. American Scientist 61:692–99. [DdC]Google Scholar

Shaffer, D. (1974) Suicide in childhood and early adolescence. Journal of Child Psychology and Psychiatry 15:275–91. [DdC]Google Scholar

Shapiro, A. M. (1975) Beau Geste? American Naturalist 109:900–02. [WJH]Google Scholar

Shneidman, E. S. (1957) The logic of suicide. In Clues to suicide, ed. Shneidman, E. S. and Farberow, N. L.. New York: McGraw-Hill. [DdC]Google Scholar

Shneidman, E. S. (1968) Classifications of suicidal phenomena. Bulletin of Suicidology 2:1–9. [DdC]Google Scholar

Shneidman, E. S. (1969) Prologue. In On the nature of suicide. San Francisco: Jossey-Bass.Google Scholar

Shneidman, E. S. (1976a) Current overview of suicide. In Suicidology: contemporary developments, ed. Shneidman, E. S.. New York: Grune & Stratton. [DdC]Google Scholar

Shneidman, E. S. (1976b) Suicide among the gifted. In Suicidology: contemporary developments, ed. Shneidman, E. S.. New York: Grune & Stratton. [DdC]Google Scholar

Shneidman, E. S. (1976c) Suicide notes reconsidered. In Suicidology: contemporary developments, ed. Shneidman, E. S.. New York: Grune & Stratton. [DdC]Google Scholar

Skinner, B. F. (1969) Contingencies of reinforcement: a theoretical analysis. New York: Appleton-Century-Crofts. [DdC, WJH]Google Scholar

Slater, M. K. (1959) Ecological factors in the origin of incest. American Anthropologist 61:1042–59. [DL]Google Scholar

Stanley, S. M. (1975) A theory of evolution above the species level. Proceedings of the National Academy of Sciences 72:646–50. [DdC]Google Scholar

Stein, L. (1978) Reward transmitters: catecholamines and opioid peptides. In Psychopharmacology: a generation of progress, ed. Lipton, M. A., DiMascio, A. and Killam, K. F.. New York: Raven Press. [DdC]Google Scholar

Stearns, S. C. (1976) Life history tactics, a review of the ideas. Quarterly Review of Biology 51:3–47. [DSW]Google Scholar

Stengel, E. (1973) Suicide and attempted suicide. Harmondsworth: Penguin Books. [DdC, RDW]Google Scholar

Stone, E. A. (1975) Stress and catecholamines. In Catecholamines and behavior, vol. 2, ed. Friedhoff, A. J.. New York: Plenum Press. [HA]Google Scholar

Stretch, R.; Orloff, E. R.; and Dalrymple, S. D. (1968) Maintenance of responding by fixed-interval schedule of electric shock presentation in squirrel monkeys. Science 162:583–86. [GF]CrossRefGoogle ScholarPubMed

Tabachnick, N. (1970) The crisis treatment of suicide. California Medicine 112(6): 1–8. [DL]Google Scholar

Temoche, A.; Pugh, T. F.; and MacMahon, B. (1964) Suicide rates among current and former mental institution patients. Journal of Nervous and Mental Disorders 138:124–30. [DdC]Google Scholar

Toolman, J. M. (1968) Suicide in childhood and adolescence. In Suicidal behaviors, ed. Resnik, H. L. P.. Boston: Little Brown and Co. [DdC]Google Scholar

Tripodes, P. (1976) Reasoning patterns in suicide notes. In Suicidology: contemporary developments, ed. Shneidman, E. S.. New York: Grune & Stratton. [DdC]Google Scholar

Trivers, R. L. (1971) The evolution of reciprocal altruism. Quarterly Review of Biology 46:35–57. [DdC]CrossRefGoogle Scholar

Trivers, R. L. (1972) Parental investment and sexual selection. In Sexual selection and the descent of man, ed. Campbell, B.. Chicago: Aldine. [WJH]Google Scholar

Venkoba Rao, A. (1975) Suicide in India. In Suicide in different cultures, ed. Farberow, N. L.. Baltimore: University Park Press. [DdC]Google Scholar

Wade, M. J. (1978) A critical review of the models of group selection. Quarterly Review of Biology 53:101–14. [DdC]CrossRefGoogle Scholar

Washburn, S. L. (1978) Human behavior and the behavior of other animals. American Psychologist 33:405–18. [DdC]CrossRefGoogle Scholar

Weil-Maherbe, H. (1972) The biochemistry of affective disorders. In Handbook of neurochemistry, vol. 7, ed. Lathja, A.. New York: Plenum Press. [DdC]Google Scholar

Weiss, J. M. A. (1968) Suicide in the aged. In Suicidal behaviors, ed. Resnik, H. L. P.. Boston: Little Brown and Co. [DdC]Google Scholar

Weiss, J. M.; Glazer, H. I.; and Pohorecky, L. A. (1976) Coping behavior and neurochemical changes: an alternative explanation for the original “Learned Helplessness” experiments. In Animal models in human psychobiology, ed. Serban, G. and Kling, A.. New York: Plenum Press. [HA]Google Scholar

Welch, B. L., and Welch, A. S. (1970) Control of brain catecholamines and serotonin during acute stress and after d-amphetamine by natural inhibition of monoamine oxidase: an hypothesis. In Amphetamines and related compounds, ed. Costa, E. and Garattini, S.. New York: Raven Press. [HA]Google Scholar

Wetzel, R. D. (1975a) Ratings of life and death and suicide intent. Psychological Reports 27:879–85. [RDW]Google Scholar

Wetzel, R. D. (1975b) Self-concept and suicide intent. Psychological Reports 36:279–82. [RDW]Google Scholar

Wetzel, R. D. (1976a) Hopelessness, depression, and suicide intent. Archives of General Psychiatry 33:1069–73. [RDW]CrossRefGoogle ScholarPubMed

Wetzel, R. D. (1976b) Semantic differential ratings of concepts and suicide intent. Journal of Clinical Psychology 32:4–12. [RDW]3.0.CO;2-H>CrossRefGoogle ScholarPubMed

Wetzel, R. D., and Murphy, G. E. (in preparation) A model to predict future suicide rates in the United States. [RDW]Google Scholar

Wetzel, R. D., Margulies, T., Davis, R., and Karam, E. (in press) Depression, hopelessness and suicide intent. Journal of Clinical Psychiatry. [RDW]Google Scholar

Wiens, J. A. (1971) On group selection and Wynne-Edwards' hypothesis. In Natural regulation of animal populations, ed. McClaren, I. A.. New York: Atherton Press. [DdC]Google Scholar

Williams, G. C. (1957) Pleiotropy, natural selection, and the evolution of senescence. Evolution 11:398–411. [DdC, RD]Google Scholar

Wilson, D. S. (1980) The natural selection of populations and communities. Menlo Park, Calif.: Benjamin/Cummings. [DSW]Google Scholar

Wilson, E. O. (1971) The insect societies. Cambridge, Mass.: Belknap. [DdC]Google Scholar

Wilson, E. O. (1975) Sociobiology. Cambridge, Mass.: Belknap. [DdC, JDD, WJH]Google Scholar

Wilson, E. O. (1978) On Human Nature, Cambridge, Mass.: Harvard University Press. [JDD]Google ScholarPubMed

Winokur, G. (1978) Mania and depression: family studies and genetics in relation to treatment. In Psychopharmacology: a generation of progress, ed. Lipton, M. A., DiMascio, A. and Killam, K. F.. New York: Raven Press. [HA]Google Scholar

Worden, J. W. (1976) Lethality factors and the suicide attempt. In Suicidology: contemporary developments, ed. Shneidman, E. S.. New York: Grune & Stratton. [DdC]Google Scholar

Wright, S. (1922) Coefficients of interbreeding and relationship. American Naturalist 56:330–39. [DdC]Google Scholar

Wynne-Edwards, V. C. (1962) Animal dispersion in relation to social behaviour. New York: Hafner. [DdC]Google Scholar

Wynne-Edwards, V. C. (1971) Self-regulating systems in populations of animals. In Natural regulation of animal populations, ed. McClaren, I. A.. New York: Atherton Press. [DdC]Google Scholar