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  1. The fossil turtles of North America, by Oliver Perry Hay.
    By: Hay, Oliver Perry,
    Publication info: Washington, D.C. :Pub. by the Carnegie Institution of Washington,1908.
    Contributed by: University of California Libraries (archive.org)
    Subjects: Chelonia, Fossil  North America  Paleontology  Reptiles, Fossil  
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  2. The fossil turtles of North America, by Oliver Perry Hay.
    By: Hay, Oliver Perry,
    Publication info: Washington, D.C.,Pub. by the Carnegie Institution of Washington,1908.
    Contributed by: Smithsonian Libraries
    Subjects: Chelonia, Fossil  North America  Paleontology  
    BHL Collections: Smithsonian Institution Libraries
    View Book