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Herpetologists' League, 1967
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JSTOR, 1965
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JSTOR, 1964
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JSTOR, 1964
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University of Chicago Press, 1962
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JSTOR, 1962
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Herpetologists' League, 1962
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American Institute of Biological Sciences, 1962
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JSTOR, 1961
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JSTOR, 1961
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JSTOR, 1959
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JSTOR, 1958
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Southwestern Association of Naturalists, 1958
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Chapman Grant, 1958
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JSTOR, 1957
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Wiley, 1957
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Duke University Press, 1957
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JSTOR, 1956
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JSTOR, 1954
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JSTOR, 1954