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Nitrate and selected pesticides in ground water of the Mid-Atlantic region

Ator, Scott W., author.
Baltimore, Maryland : United States Geological Survey, 1997.

Nitrate in ground water in the Great Valley carbonate subunit of the Potomac River Basin

Ferrari, Matthew J.
[Washington, D.C.?] : U.S. Geological Survey, [1995?]

Pesticides in surface water of the Mid-Atlantic region

Ferrari, Matthew J., author.
Baltimore, Maryland : U.S. Department of the Interior, U.S. Geological Survey, [1997]

Summary of pesticide data from streams and wells in the Potomac River Basin, 1993-96

Donnelly, Colleen A.
[Baltimore, Md. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : Branch of Information Services, distributor], 1998.

Water-quality assessment of the Potomac River Basin : occurrence of pesticides in the Great Valley C

Ferrari, Matthew J.
Baltimore, Md. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : Branch of Information Services [distributor], 1999.