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  1. Freshwater isopods (Asellidae) of North America, by W. D. Williams.
    By: Williams, W. D. - Oceanography and Limnology Program (Smithsonian Institution) - United States. Environmental Protection Agency.
    Publication info: [Washington,U.S. Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off.,1972.
    Holding Institution: MBLWHOI Library
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