1. Beaumont, P. B., and Vogel, J. C., Afric. Studies (in the press).
2. Clark, J. D., The Prehistory of Southern Africa (Penguin, Harmondsworth, 1959).
3. Deacon, J., Ann. Cape Prov. Mus., 5 (1966)
4. Vogel, J. C., Radiocarbon, 12, No. 2, 444 (1970).
5. Louw, A. W., Brain, C. K., Vogel, J. C., Mason, R. J., and Eloff, J. F., S. Afric. Archaeol. Bull., 24 (1969).