By Grant, Michael
By Thomas A. Hale
By Appiah, Kwame Anthony
By Malcioln, Jose V
By Davidson, Basil, Bauh, F.K.
By Harlow, Barbara, Carter, Mia
By Leys, Colin, Saul, John S
By Spring, Chris
By Omer-Cooper, J.D., etc., Afigbo, A.E.
By Gerner, Deborah J.
By Williams, Susan
By Tarrosy, Istvan, Szabó, Lorand, Hyden, Goran
By Walvin, James
By Richard Dowden
By World Bank
By Mbiti, John S.
By Crowley, Roger
By Fage, J., Oliver, Roland
By Brooke-Smith, Robin
By Mazrui, Ali A.
By Griffiths, Ieuan L.L.
By Rooney, David
By Kapuscinski, Ryszard
By Collins, Robert O.
By International African Institute, Baker, Philip
By Latham, Norah, Amoni, I.J.
By Romer, John
By Garry J. Shaw
By Porteous, Tom
By Tyldesley, Joyce