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  1. The Tertiary and Quaternary Pectens of California / Ralph Arnold.
    By: Arnold, Ralph,
    Publication info: Washington :Govt. Print. Off.,1906.
    Contributed by: Smithsonian Libraries
    Subjects: California  Paleontology  Quaternary  Scallops  Scallops, Fossil  Tertiary  
    BHL Collections: Smithsonian Institution Libraries
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