4Thomas J. Barfield:《The Nomadic Alternative》, 1993 by Prentice-Hall, Inc. A Simon & Schuster Company.
5A. M. khazanov: 《Nomads and the Outside World》, Cambridge, Cambridge University Press, 1983.
6P.T. Robertshaw and D.P. Collett: 《The identification of pastoral peoples in the archaeological recont: an example from East Africa》(引文郑君雷译),World Archaeology 15.1:67-78.1983.
1J. Desmond Clark, The Prehistory of Africa, Praeger Publishers, New York : Washington, 1970, P149 - 151.
2贾雷德·雷蒙德.枪炮、病菌与钢铁.上海:上海译文出版社,2000.
3Barbara Bender, Gatherer - Hunter to Farmer - A Social Perspective, World Archaeology, Oct. Vol. 10, No. 2, Archaeology and Religion, 1978, P 204 -222.
4Butzer K. W. and C. I Hansen, Desert and River in Nu- b/a, University of Wisconsin Press, 1968, P171 - 174.
5J. Desmond Clark, The Prehistory of Africa, Praeger Publishers, New York Washington, 1970, P46.
6Peter Bellwood, First Farmers - the Origins of Agricul- tural Societies, Blackwell Publishing, UK, 2005.
7Jack R. Harlan, Indigenous African Agriculture, 1992. In C. Wesley Cowan and Patty Jo Watson ed. , The Origins of Agriculture - an International Perspective, Smithsonian Institution Press, Washington and London, 1992, P59 - 70.
8Butzer K. W. and C. L. Hansen, Desert and River in Nu- bia, University of Wisconsin Press, 1968, P171 - 174.
9Wendorf F. and R. Said, Palaeolithic Remains in Upper Egypt, Nature, 215, 5098, 1967, P244-247.
10Thomas J. Barfield, The Nomadic Alternative, Prentice - Hall, Inc. A Simon & Schuster Company, 1993.