Developed from hardcover editions of Biography and Genealogy Master Index, second edition (1980-81), and its annual updates, Bio-Base 2000 Master Cumulation provides more than 12.7 million citations from more than 1, 250 biographical dictionaries and who's whos in a single, easy-to-use source. This edition supersedes Bio-Base 1990 Master Cumulation, Bio-Base 1995 and Bio-Base 1996-99. Bio-Base 2001 (microfiche and booklet) contains a bibliographic listing of all the sources indexed in Bio-Base 2000 Master Cumulation.