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    Evaluation of agricultural best-management practices in the Conestoga River Headwaters, Pennsylvania : a summary report, 1982-90 by Lietman, Patricia L.

    Published: U.S. G.P.O. ; For sale by the U.S. Geological Survey, Branch of Information Services, 1997
    Description: vi, 69 pages : illustrations, maps ; 28 cm.
    Book