1.
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Second addition to the knowledge of the Batrachia and Reptilia of Costa Pica Cope, Edward Drinker
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2.
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Third addition to a knowledge of the Batrachia and Reptilia of Costa Rica Cope, Edward Drinker
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3.
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Contributions to our knowledge of the duration of life in vertebrate animals Flower, Stanley S
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4.
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An analysis of the knowledge of the turtle fauna of Mexico Rozella B Smith - Hobart M Smith
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