File:North American Plesiosaurs- Elasmosaurus, Cimoliasaurus, and Polycotylus.pdf

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Description	English: North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus
Date	18 August 2014, 14:52:04
Source	American Journal of Science
Author	Samuel Wendell Williston

Public domain	This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1930, and if not then due to lack of notice or renewal. See this page for further explanation.	United States
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