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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. The trees and shrubs of Oklahoma /
    By: Shannon, Charles William,
    Publication info: Norman :Oklahoma Geological Survey,1913.
    Contributed by: Mertz Library, The New York Botanical Garden
    BHL Collections: New York Botanical Garden
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