Cupitt, Don
The nature of man
Sheldon Press, 1979
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Panchen, Alec L.
Classification, evolution, and the nature of biology
Cambridge University Press, 1994
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Odum, Howard T.
Energy basis for man and nature
McGraw-Hill, 1981
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Niebuhr, Reinhold
The nature and destiny of man
Charles Scribners Sons, 1945
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Cornwell, Alan
Biology, man, and society
McGraw-Hill, 1974
 Buku Teks SO