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    Relations of biological indicators to nutrient data for lakes and streams in Pennsylvania and West Virginia, 1990-98 by Brightbill, Robin A.

    Published: U.S. Dept. of the Interior, U.S. Geological Survey ; U.S. Geological Survey, Branch of Information Services [distributor], 2003
    Description: viii, 67 pages : illustrations, maps ; 28 cm.
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    Relations of biological indicators to nutrient data for lakes and streams in Pennsylvania and West Virginia, 1990-98

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