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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Ray, Clayton Edward.
    Publication info: Washington, Smithsonian Institution Press, 1976
    Holding Institution: Smithsonian Libraries and Archives
    Subjects: North America  Paleontology  Phoca wymani  Phocidae, Fossil  Tertiary  
    BHL Collections: Unearthed! Smithsonian Libraries' Paleo Collection