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 cummulation 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.