1. (1978) Functional interpretations of the morphology of postcranial remains of early African hominids. In: Early Hominids of Africa. ed. St. Martin's, New York, pp. 311-345.
2. , and (1954) The principal elements in human locomotion. In: Human Limbs and Their Substitutes. and , eds. McGraw-Hill, New York, pp. 437-471.
3. The Seed-Eaters: A New Model of Hominid Differentiation Based on a Baboon Analogy
4. (1978) A biomechanical review of the locomotor diversity of early hominids. In: Early Hominids of Africa. ed. St. Martin's, New York, pp. 403-429.
5. (1975) Uniqueness and Diversity in Human Evolution: Morphometric Studies of Australopithecines. University of Chicago Press, Chicago,Illinois.