North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus

Samuel Wendell Williston (1851–1918) was a distinguished American paleontologist, geologist, and educator, particularly known for his contributions to the field of vertebrate paleontology. As a scholar of the late 19th and early 20th centuries, Williston made significant advances in the classification and understanding of extinct reptiles. His work 'North American Plesiosaurs: Elasmosaurus, Cimoli...