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  1. Animal and plant life in Oklahoma,
    By: Oklahoma Geological Survey. - Cross, Howard. - Shannon, Charles William, - Stevens, George Walter.
    Publication info: Norman,1917.
    Contributed by: Cornell University Library
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  2. Geology of a portion of northeastern Oklahoma. Paleontology of the Chester Group in Oklahoma / by L.C. Snider. --
    By: Snider, Luther C. - Oklahoma Geological Survey.
    Publication info: Norman :[University of Oklahoma?],1915.
    Contributed by: University of British Columbia Library (archive.org)
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