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Please read BHL's Acknowledgment of Harmful Content
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  1. By: National Museum of Natural History (U.S.) Pacific Ocean Biological Survey Program - Clapp, Roger B. - Clapp, Tina Abbott
    Publication info: 1965
    Holding Institution: Smithsonian Institution Archives
    Subjects: Birds--United States  District of Columbia  Field notes  Herpetology  Ornithology  Potomac River  Reports  Research notes  Snakes--United States  United States  Western rat snake  
    BHL Collections: Smithsonian Field Books collection