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Classification and mapping of agricultural land for national water-quality assessment

Gilliom, Robert J.
Washington : U.S. G.P.O. ; Denver, Colo. : Free on application to the U.S. Geological Survey, Information Services, 1997. 1997

Design of the national water-quality assessment program : occurrence and distribution of water-quali

Gilliom, Robert J.
Sacramento, Calif. : U.S. Geological Survey ; [Washington] U.S. G.P.O., 1995. 1995

The National Water-Quality Assessment Program entering a new decade of investigations

Gilliom, Robert J.
[Reston, Va. : U.S. Geological Survey, 2001] 2001

Pesticides in the Nation's streams and ground water, 1992-2001 : a summary

Gilliom, Robert J.
Sacremento, Calif. : U.S. Geological Survey, 2006. 2006

Pesticides in the nation's streams and ground water, 1992-2001 the quality of our nation's waters

Reston, VA : U.S. Geological Survey, [2006] 2006

Quality of water from domestic wells in principal aquifers of the United States, 1991-2004 overview

Desimone, Leslie A.
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2009. 2009

Tracking and forecasting the nation's water quality priorities and strategies for 2013-2023

Rowe, Gary L., author.
Reston, Va. : U.S. Department. of the Interior, U.S. Geological Survey, [2013] 2013

Update of watershed regressions for pesticides (WARP) for predicting atrazine concentration in strea

Stone, Wesley W.
Reston, Va. : U.S. Geological Survey, 2009. 2009

Watershed regressions for pesticides (WARP) for predicting atrazine concentration in Corn Belt strea

Stone, Wesley W.
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2011. 2011