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<br />.... <br />~ <br /> <br />.;:. <br /> <br />f\.. <br /> <br />Summary of Biological and Contaminant <br />Investigations Related to Stream Water <br />Quality and Environmental Setting in the <br />Upper Colorado River Basin, 1938-95 <br /> <br />By JEFFREY R. DEACON and VERLlN C. STEPHENS <br /> <br />U.S. GEOLOGICAL SURVEY <br /> <br />Water-Resources Investigations Report 96-4172 <br /> <br />Denver. Colorado <br />1996 <br /> <br />