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  • Cover of: Water-quality assessment of the Rio Grande Valley, Colorado, New Mexico, and Texas: shallow ground-water quality of a land-use area in the San Luis Valley, south-central Colorado, 1993

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  • Cover of: Water quality assessments: a guide to the use of biota, sediments, and water in environmental monitoring

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  • Cover of: Water-quality assessment of part of the upper Mississippi River Basin, Minnesota and Wisconsin: ground-water quality in the Prairie du Chien-Jordan aquifer 1996

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  • Cover of: Ground-water quality assessment of the central Oklahoma aquifer, Oklahoma: analysis of available water-quality data through 1987

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  • Cover of: Water-quality assessment of the Trinity River Basin, Texas: pesticides in streams draining an urban and an agricultural area, 1993-95 / by L.F. Land and M.F. Brown.

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  • Cover of: Water-quality assessment of the Rio Grande Valley, Colorado, New Mexico and Texas: organic compounds and trace elements in bed sediment and fish tissue, 1992-93

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  • Cover of: Water-quality assessment of the central Nebraska basins: summary of data for recent conditions through 1990

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  • Cover of: Water-quality assessment of part of the upper Mississippi River Basin, Minnesota and Wisconsin: nitrogen and phosphorus in streams, streambed sediment, and ground water, 1971-94

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  • Cover of: Ground-water data-collection protocols and procedures for the National Water-Quality Assessment Program: collection and documentation of water-quality samples and related data

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  • Cover of: Water-quality assessment of the Trinity River Basin, Texas: pesticides in a suburban watershed, Arlington, 1993-94

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  • Cover of: Water-quality assessment of the Potomac River Basin: analysis of available pesticide data, 1972-90

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  • Cover of: National Water-Quality Assessment Program.

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  • Cover of: National Water-Quality Assessment Program.

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  • Cover of: National Water-Quality Assessment Program: Northern Rockies Intermontane Basins

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  • Cover of: National water-quality assessment: Geological Survey faces formidable data management challenges : report to the Chairman, Environment, Energy, and Natural Resources Subcommittee, Committee on Government Operations, House of Representatives

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  • Cover of: Surface water-quality assessment of the lower Kansas River basin, Kansas and Nebraska: analysis of available water-quality data through 1986

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  • Cover of: NAWQA, National Water-Quality Assessment Program: Allegheny-Monongahela River Basin.

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  • Cover of: Water-quality assessment of the Ozark plateaus study unit, Arkansas, Kansas, Missouri, and Oklahoma: fish communities in streams of the Ozark plateaus and their relations to selected environmental factors

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  • Cover of: Water-quality, biological, and habitat assessment of the Boeuf River basin, southeastern Arkansas, 1994-96

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  • Cover of: Surface-water-quality assessment of the Upper Illinois River basin in Illinois, Indiana, and Wisconsin: data on manmade nonagricultural volatile and semivolatile organic chemicals in water, May 1988 through March 1990

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