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By: Gawne, Constance ElaineEdition:Publication info: New York, N.Y, American Museum of Natural History, [1968]Volume: no. 2315Series:Holding Institution: American Museum of Natural History LibrarySubjects: 56.9,33(1181:78) Hedgehogs, Fossil Mammals, Fossil Nebraska Oligocene Paleontology Proterix bicuspis Proterix loomisi South DakotaBHL Collections: