Dobzhansky, Theodosius
Columbia University Press, 1956
Buku Teks
Bookchin, Murray
Black Rose Books, 1991
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Heimann, Eduard
Charles Scribner`s Sons, 1947
Buku Teks
Hurst, James Willard
The University of Wisconsin Press, 1956
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Holcombe, Arthur N.
New York University press, 1948
Buku Teks