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By: McKenna, Malcolm C.Edition:Publication info: New York, N.Y American Museum of Natural History [1961]Volume: no.2037 (1961)Series:Holding Institution: American Museum of Natural History LibrarySubjects: 56.9,32(1181:78.6) Carbon County Evolution Mammals, Fossil Montana Origin Paleocene Paleontology Paramys atavus Rodents Rodents, Fossil Teeth, FossilBHL Collections: