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<br />Identification of Water-Quality Trends <br />Using Sediment Cores from Dillon <br />Reservoir, Summit County, Colorado <br /> <br />By Adrienne I. Greve, Norman E. Spahr, Peter C. Van Metre, and <br />Jennifer T. Wilson <br /> <br />U.S. GEOLOGICAL SURVEY <br /> <br />Water-Resources Investigations Report 01-4022 <br /> <br /> <br />NATIONAL WATER-QUALITY ASSESSMENT PROGRAM <br /> <br />Denver, Colorado <br />2001 <br />