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By: Simpson, George Gaylord,Edition:Publication info: New York, American Museum of Natural History, [1951]Volume: no. 1541Series:Holding Institution: American Museum of Natural History LibrarySubjects: 56.9.33(117:7) Canada Cretaceous Insectivores (Mammals), Fossil Lance Formation (Colo. and Wyo.) Mammals, Fossil Paleontology West (U.S.) WyomingBHL Collections: