Samuel Wendell Williston: North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus
In ‚North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus, ‚ Samuel Wendell Williston delivers a comprehensive exploration of three distinct genera of plesiosaurs that inhabited th …