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<br />Field Screening of Water, Soil, Bottom Sediment, and <br />Biota Associated with Irrigation Drainage in the <br />Dolores Project and the Mancos River Basin, <br />Southwestern Colorado, 1994 <br /> <br />by David L. Butler, <br />U.S. Geological Survey, and <br />Barbara Campbell Osmundson and Richard P. Krueger, <br />U.S. Fish and Wildlife Service <br /> <br />U.S. GEOLOGICAL SURVEY <br /> <br />Water-Resources Investigations Report 97-4008 <br /> <br />U.s. GEOLOGICAL SURVEY <br />U.S. FISH AND WILDLIFE SERVICE <br />BUREAU OF RECLAMA liON <br />BUREAU OF INDIAN AFFAIRS. <br /> <br />Denver, Colorado <br />1997 <br /> <br />