Bibliographie Linguistique/ Linguistic Bibliography is the annual bibliography of linguistics published by the Permanent International Committee of Linguists under the auspices of the International Council of Philosophy and Humanistic Studies of UNESCO. With a tradition of more than fifty years (the first two volumes, covering the years 1939-1947, were published in 1949-1950), Bibliographie Linguistique is by far the most comprehensive bibliography in the field. It covers all branches of linguistics and related disciplines, both theoretical and descriptive, from all geographical areas, including less known and extinct languages, with particular attention to the many endangered languages of the world. Up-to-date information is guaranteed by the collaboration of some fifty contributing specialists from all over the world. With over 23,000 titles arranged according to a detailed state-of-the-art classification, Bibliographie Linguistique remains the standard reference book for every student of language and linguistics. An important innovation in this fifty-second edition is the revised and much expanded classification of the languages of South America.