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  1. 1
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    Government Document Journal
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    Journal of research of the U.S. Geological Survey.
  2. 2
    by Brown, George Wallace, 1939-
    Published 1972
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    Book
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    Forestry and water quality /
  3. 3
    Published 1990
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    Book
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    A History of the Water Resources Division of the U.S. Geological Survey /

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