The structure of the present Liturgical chant bibliography 9 maintains the previously established format: (1) Editions and facsimile editions, (2) Books and reprints, (3) Congress reports, (4) Chant journals, (5) Collections of essays, dictionaries and periodicals, (6) Articles in periodicals. All of the material contained in the bibliography may be accessed by means of the indices of names, subjects and manuscripts. This year, I would like to draw particular attention to several facsimile editions of chant manuscripts: Il Libro del Maestro, Piacenza 9 (9002), The York Processional (9003), the Breviarium notatum strigoniense (9005) and an Antiphonaire cistercien, XII s. (9007). The first mentioned of these facsimiles has been the centre of a number of related publications (9024, 9039, 9060, 9077f, 9138). The famous Ars nova manuscript from Cyprus (9008) has been published in facsimile. Previously, the small chant repertory it contains (fols 1-28) had been available in Richard H. Hoppin: Cypriot Plainchant of the Manuscript Torino Biblioteca Nazionale J. II. 9. A Facsimile Edition with Commentary, Musicological Studies and Documents 19 (American Institute of Musicology, 1968).