Howells, William D.
Mankind in the making : the story of human evolution
Doubleday, 1967
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Pfeiffer, John E.
The emergence of man
Harper & Row, 1969
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Murray, Raymond W.
Mans unknown ancestors: the story of prehistoric man
Bruce Publishing, 1943
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Edel, May
The story of our ancestors
Little, Brown, 1955
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Kuhn, Herbert
On the track of prehistoric man
Random House, 1955
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