Oliver, Roland; Spear, Thomas; Klieman, Kairn; Vansina, Jan; MacEachern, Scott; Schoenbrun, David; Denbow, James; Bastin, Yvonne; Batibo, H. M; Heine, Bernd; Mann, Michael; Nurse, Derek; Wandibba, Simiyu (Boston University African Studies CenterInstitute of African Studies, University of Nairobi, 2001)