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By "Twitchell, M. W. (Mayville William), 1868-1927"
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The Mesozoic and Cenozoic Echinodermata of the United States
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By: Clark, William Bullock, - Twitchell, M. W. (Mayville William),
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Publication info: Washington, Govt. print. off, 1915
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Holding Institution: University of Connecticut Libraries
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