1. Coppens Y., Clark Howell, F., Isaac, G. LI. & Leakey, R. E. F. (eds) Earliest Man and Environments in the Lake Rudolf Basin (University of Chicago Press, 1976).
2. Findlater, L. C. in Geological Background to Fossil Man (ed. Bishop, W. W.) (Scottish Academic, Edinburgh, 1978).
3. Leakey, R. E. F. & Leakey, M. (eds) Koobi Fora Res. Project Monogr. 1 (Clarendon, Oxford, 1978).
4. Brown, F. H. Am. Ass. Advt Sci. Spec. Monogr. 158 (1981).
5. Bonnefille, R. in Earliest Man and Environments in the Lake Rudolf Basin (eds Coppens, V., Clark Howell, F., Isaac, G. LI. & Leakey, R. E. F.) (University of Chicago Press, 1976).