North American plesiosaurs Elasmosaurus, Cimoliasaurus, and Polycotylus

• 1 March 1906
• journal article
• Published by American Journal of Science (AJS) in American Journal of Science
• Vol. s4-21  (123) , 221-236
• https://doi.org/10.2475/ajs.s4-21.123.221

Abstract