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  1. 1
    Quality of surface waters of the United States, 1949.
    by Paulsen, Carl G.
    Published 1954
    Subjects: “...Water quality United States....”
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    Government Document eBook
  2. 2
    Quality of surface waters of the United States, 1954.
    Subjects: “...Water quality United States. http://id.loc.gov/authorities/subjects/sh85145602...”
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    Government Document eBook
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