North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus: Enriched edition. Exploring the Ancient Marine Reptiles of North AmericaSamuel Wendell Williston0
Water Reptiles of the Past and Present: Enriched edition. Exploring the Aquatic World: Evolution, Anatomy, and Behavior of Water ReptilesSamuel Wendell Williston0
