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  1. 1
    Herbicide concentrations in and loads transported by the Conestoga River and Pequea Creek, Lancaster County, Pennsylvania, 1992-95 /
    “...U.S. Geological Survey,...”
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    Government Document eBook
  2. 2
    Herbicide concentrations in and loads transported by the Conestoga River and Pequea Creek, Lancaster County, Pennsylvania, 1992-95.
    by Reed, Lloyd A.
    Published 1997
    “...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
    Government Document Book
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