1. Archibald, J. D., C. O. Lovejoy, &K. G. Heiple, 1972. Implications of relative robusticity in the Olduvai metatarsus.Amer. J. Phys. Anthrop. 37: 93–95.
2. Baker, R. H., 1968. Habitats and distribution. In:Biology of Peromyscus (Rodentia),J. A. King (ed.), Amer. Soc. Mammalog., Special Publ. No. 2.
3. Campbell, B., 1966.Human Evolution: An Introduction to Man's Adaptations. Cambridge Univ. Press, New York.
4. Cartmill, M., 1972. Arboreal adaptations and the origin of the Order Primates. In:The Functional and Evolutionary Biology of Primates R. Tuttle (ed.), Aldine-Atherton, Chicago, New York, pp. 97–122.
5. Day, M. H. &J. R. Napier, 1964. Fossil footbones.Nature 201: 969–970.