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  1. A catalogue of the Cretaceous and Tertiary plants of North America by Frank Hall Knowlton.
    By: Knowlton, Frank Hall, - United States. Geological Survey.
    Publication info: Washington :G.P.O.,1898.
    Holding Institution: Canadiana.org (archive.org)
    Subjects: Crétacé  Cretaceous  North America  Paleobotany  Tertiaire  Tertiary  
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