Vol. s4-21, Issue 123, 1906March 01, 1906 EDT
North American Plesiosaurs Elasmosaurus, Cimoliasaurus, and Polycotylus
North American Plesiosaurs Elasmosaurus, Cimoliasaurus, and Polycotylus
Samuel Wendell Williston,
Williston, S. W. (1906). North American Plesiosaurs Elasmosaurus, Cimoliasaurus, and Polycotylus. American Journal of Science, s4-21(123), 221–236. https://doi.org/10.2475/ajs.s4-21.123.221