National Water-Quality Assessment (NAWQA) Program
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Mattraw, H.C., Wilber, W.G., and Alley, W.M., 1989, Quality-assurance plan for the pilot National Water-Quality Assessment Program: U.S. Geological Survey Open-File Report 88-726, 21 p. Available Online
Scott, J.C., 1989, A computerized data-base system for land-use and land-cover data collected at ground-water sampling sites in the pilot National water-quality Assessment Program: U.S. Geological Survey Water-Resources Investigations Report 89-4172, 139 p. Available Online
Steffeck, D.W., and Striegl, R.G., 1989, An inventory and evaluation of biological investigations that relate to stream-water-quality in the Upper Illinois River Basin of Illinois, Indiana, and Wisconsin: U.S. Geological Survey Water-Resources Investigations Report 89-4041, 54 p. Available Online