1. Leakey, L. S. B., “Stone Age Races of Kenya” (Oxford Univ. Press, London, 1935).
2. Lawrence, J. W. P., Appendix A in ref. 1, p. 139.
3. Tobias, P. V., Proc. Fourth Pan-African Congress on Prehistory, Lepoldville (August 1959).
4. Leakey, L. S. B., Man, No. 210, 200 (1933).
5. Vallois, H. V., l'Anthropologie, 55, 231 (1951).