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Water - Quality Assessment of the South Platte River <br />Basin, Colorado, Nebraska, and Wyoming -- Analysis <br />of Available Nutrient, Suspended- Sediment, and <br />Pesticide Data, Water Years 1980 -92 <br />by Kevin F. Dennehy, David W. Litke, Peter B. McMahon, Janet S. Heiny, <br />and Cathy M. Tate <br />U.S. GEOLOGICAL SURVEY <br />Water- Resources Investigations Report 94 -4095 <br />Denver, Colorado <br />1995 <br />