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22- Discover, Ekim 1998, s.34
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43- Solly Zuckerman, Beyond The Ivory Tower, New York: Toplinger Publications, 1970, s. 75-94; Charles E. Oxnard, "The Place of Australopithecines in Human Evolution: Grounds for Doubt", Nature, Cilt 258, s. 389
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45- Alan Walker, Science, vol. 207, 1980, s. 1103; A. J. Kelso, Physical Antropology, 1st ed., New York: J. B. Lipincott Co., 1970, s. 221; M. D. Leakey, Olduvai Gorge, vol. 3, Cambridge: Cambridge University Press, 1971, s. 272
46- Time, Kasım 1996
47- S. J. Gould, Natural History, vol. 85, 1976, s. 30
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49- Richard Lewontin, "The Demon-Haunted World", The New York Review of Books, 9 Ocak, 1997, s. 28