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  1. By: Skinner, Morris F. - Taylor, Beryl E. - Gidley, James Williams, - Matthew, William Diller,
    Publication info: New York, N.Y, American Museum of Natural History, [1967]
    Holding Institution: American Museum of Natural History Library
    Subjects: 56(78.3)  Brule County  Formations (Geology)  Geology  Geology, Stratigraphic  Mammals, Fossil  Paleontology  South Dakota  Tertiary