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    Evaluation of agricultural best-management practices in the Conestoga River Headwaters, Pennsylvania : effects of nutrient management on quality of surface runoff at a small carbon... by Hall, David W.

    Published: U.S. Dept. of the Interior, U.S. Geological Survey ; Branch of Information Services [distributor], 1997
    Description: viii, 59 pages : illustrations, maps ; 28 cm.
    Book