Simpson, George Gaylord
Fossils and the history of life/George Gaylord Simpson
Scientific American Books , 1983
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Simpson, George Gaylord
Why and how : some problems & methods in historical biology/ George Gaylord Simpson
Pergamon Press, 1980
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The encyclopedia of prehistoric life/ edited by Rodney Steel, Anthony P. Harvey
McGraw-HIll, 1979
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Raup, David M.
Principles of paleontology/David M. Raup, Steven M. Stanley
W.H. Freeman and Co., 1978
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Hussey, Russell C.
Historical geology : the geologic history of North America
McGraw-Hill, 1947
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