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By: Simpson, George Gaylord, - McKenna, Malcolm C.Edition:Publication info: New York, N.Y, American Museum of Natural History, [1959]Volume: no. 1950Series:Holding Institution: American Museum of Natural History LibrarySubjects: 56.9,31(1181:78.7) Eocene Mammals, Fossil Paleontology Sublette County Tetrapassalus mckennai Wyoming Xenarthra, FossilBHL Collections: