Dictionary of African biography. 6 vols. Emmanuel K. Akyeampong and Henry Louis Gates, Jr., editors in chief. (Oxford ; New York : Oxford University Press, c2012)
Historical Dictionary series. Scarecrow Press (Metuchen, NJ ; Lanham, MD)
Most recent editions are in Lehman Library Reference, near "Global Studies". For a dictionary of one country, search in CLIO, with "All fields" in "Advanced Search", and use [current name of country] and "historical dictionary".
Content includes: Africana (5 volumes); Encyclopedia of African American history; Black women in America--2nd edition; and, the African American national biography.
Oxford Bibliographies Online (Oxford, UK: Oxford University Press) --Select "African Studies" ; or, see especially: