Marslan, Douglas
Principles of modern biology
Holt, Rinehart and Winston, 1964
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Nelson, Gideon E.
Biological principles with human perspetives
John Wiley & Sons, 1984
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Biological timekeeping
edited by John Brady
Cambridge University Press, 1982
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Keeton, William T.
Biological science
W.W. Norton, 1967
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Keeton, William T.
Biological science
Penguin Books, 1976
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