Proceedings of the [eighth] 8th Panafrican Congress of Prehistory and Quaternary Studies : Nairobi, 5 to 10 September 1977 - Leakey, Richard Erskine; Ogot, Bethwell A. (The International Louis Leakey Memorial Institute for African Prehistory; The Panafrican Association for Prehistory and Related Studies, 1980)