Image: North American Plesiosaurs Elasmosaurus, Cimoliasaurus, and Polycotylus Plate 4
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Description: North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus
Title: North American Plesiosaurs Elasmosaurus, Cimoliasaurus, and Polycotylus Plate 4
Credit: American Journal of Science XXI: 221–236, Pl. I–IV.
Author: Samuel Wendell Williston
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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