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  1. By: Cook, Harold J. (Harold James), - McKenna, Malcolm C.
    Publication info: New York, N.Y American Museum of Natural History [1965]
    Holding Institution: American Museum of Natural History Library
    Subjects: 55.1,782(78.2)  Formations (Geology)  Geology  Geology, Stratigraphic  Miocene  Nebraska
  2. By: McKenna, Malcolm C.
    Publication info: New York, N.Y, American Museum of Natural History, [1965]
    Holding Institution: American Museum of Natural History Library
    Subjects: 55.1,782(78.2)  Geology  Geology, Stratigraphic  Groups (Stratigraphy)  Miocene  Nebraska  Nomenclature