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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Nitecki, Matthew H.
    Publication info: Chicago, Field Museum of Natural History, 1971
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Chicago  Devonian  Illinois  Ischadities stellatus  Ontario  Paleobotany  Plants, Fossil  Silurian