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By: Moore, Joseph CurtisEdition:Publication info: New York, N.Y, American Museum of Natural History, [1961]Volume: no. 2044Series:Holding Institution: American Museum of Natural History LibrarySubjects: 59.9,32S(7/8) America Bering Land Bridge Dispersal Geographical distribution Mammals, Fossil Paleontology Panama Panama, Isthmus of Pleistocene Pliocene Squirrels Squirrels, FossilBHL Collections: