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Herbicides in midwestern reservoir outflows, 1992-93

Stamer, J. K.
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [1998] 1998

Herbicides in rainfall across the midwestern and northeastern United States, 1990-91

Stamer, J. K.
[Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 1998] 1998

Monitoring the water quality of the nation's large rivers Mississippi River Basin NASQAN program

Coupe, Richard H. (Richard Henry), 1954-
[Reston, Va. : U.S. Geological Survey, 1999?] 1999

Occurrence and transport of agricultural chemicals in the Mississippi River basin, July through Augu

Goolsby, D. A.
[Washington] : U.S. G.P.O. ; Denver, CO : Free on application to the U.S. Geological Survey, Map Distribution, 1993. 1993