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Distribution of selected herbicides and nitrate in the Mississippi River and its major tributaries, April through June 1991
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Flux and sources of nutrients in the Mississippi-Atchafalaya River Basin
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Herbicides in midwestern reservoir outflows, 1992-93
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Limnology of Taylor Creek impoundment with reference to other bodies in Upper St. Johns River Basin, Florida
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Monitoring the water quality of the nation's large rivers
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Occurrence and transport of agricultural chemicals in the Mississippi River basin, July through August 1993
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