1. Adams, R. McC., 1966, The Evolution of Urban Society. Aldine, Chicago.
2. Adams, W. Y., 1977, Nubia: Corridor to Africa. Allen Lane, London.
3. Allsen, T. T., 1987, Mongol Imperialism. University of California Press, Berkeley.
4. Anderson, D. G., 1994, The Savannah River Chiefdoms: Political Change in the Late Prehistoric Southeast. University of Alabama Press, Tuscaloosa.
5. Anderson, J. E., 1968, Late Paleolithic Skeletal Remains from Nubia. In The Prehistory of Nubia, edited by F. Wendorf, pp. 996-1040. Southern Methodist University Press, Dallas.