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<br />Water Quality in the Upper Colorado River <br />Basin, Colorado, 1996-98 <br /> <br />By Norman E. Spahr, Lori E. Apodaca, Jeffrey R. Deacon, Jeffrey B. Bails, <br />Nancy J. Bauch, C. Michelle Smith, and Nancy E. Driver <br /> <br />u.s. GEOLOGICAL SURVEY CIRCULAR 1214 <br />