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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Bohrer, Vorsila L. - Martin, Paul S. (Paul Sidney),
    Publication info: [Chicago], Field Museum of Natural History, 1972
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Arizona  Hay Hollow site  Hay Hollow site, Ariz  Paleoecology  Palynology