Each Biography and Genealogy Master Index Cumulation of Supplements makes available in one alphabet all of the material indexed in the supplement volumes during a five-year period. Five cumulation volumes have been published since the base set was issued in 1980-81. The Biography and Genealogy Master Index is designed to help you easily determine which publication to consult for biographical information. Sources cover both living and deceased persons from every field of activity and from every country in the world. Typically current, readily available, standard reference works are indexed. More than 15 million citations compiled from more than 5, 000 editions and volumes of approximately 1, 700 current and retrospective biographical sources are included in the Biography and Genealogy Master Index base set and its 31 supplements. In total, Biography and Genealogy Master Index provides coverage of nearly 5 million contemporary and historical figures.