A general, if antiquated, reference to the early progenitors of bipedal evolution.
"Frontispiece to Huxley's Evidence as to Man's Place in Nature, 1863" by Benjamin Waterhouse Hawkins
A04 Dancehall of the Dead (02-04) p. 20 A04 Dancehall of the Dead (02-04) p. 41
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Jordan, P. 1999 Early Man. Stroud: Sutton Pub.
May, D. W. 2011 Reinvestigation of the Cape site : an "early man" locality in western Nebraska. Current Research In The Pleistocene 28: 2860-61.
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