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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Hoff, C. Clayton (Clarence Clayton),
    Publication info: New York American Museum of Natural History [1950]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.54,7C(7)  Arachnida  Cheliferidae  Classification  North America  Pseudoscorpions