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<br />n:'l"': "5 <br />C :J..... J,,- . <br /> <br />Physical, Chemical, and Biological Data for <br />Detailed Study of Irrigation Drainage in the <br />Uncompahgre Project Area and in the Grand <br />Valley, West-Central Colorado, 1991-92 <br /> <br />by David L. Butler and Winfield G. Wright, U.S. Geological Survey, <br />Dorothy A. Hahn, Richard P. Krueger, and <br />Barbara Campbell Osmundson, U.S. Fish and Wildlife Service <br /> <br />U.S. GEOLOGICAL SURVEY <br /> <br />Open-File Report 94-110 <br /> <br />u.s. GEOLOGICAL SURVEY <br />U.S. FISH AND WILDLIFE SERVICE <br />BUREAU OF RECLAMATION <br />BUREAU OF INDIAN AFFAIRS <br /> <br />Denver, Colorado <br />1994 <br /> <br />