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• <br />• <br /> <br />References <br />American Public Health Association (Ed.). 1985. "Standard Methods for <br />the Examination of water and Wastewater", 16th Edition, Washington, D.C. <br />Brakensieh and others. 1979. "Field Manual for Research in Agricultural <br />Hydrology". <br />Buchanan and Sumers. 1968. "Stage Measurements at Gaging Stations" <br />Colorado Dept. of Health. August 2005. "Regulation No. 31, The Basic <br />Standards and Methodologies for Surface Water" <br />Colorado Dept. of Health. December 2005. "Regulation No. 33, <br />Classification and Numeric Standards for the Upper Colorado River Basin" <br />Colorado Dept. of Health. November 2004. "Regulation No. 41, The Basic <br />Standards for Ground Water" <br />EPA. 1976. "Quality Criteria for Water" <br />Hem, John D. 1989. "Study and Interpretation of the Chemical <br />Characteristics of Natural Water" USGS Water Supply Paper 2254, Third <br />Edition <br />15 <br />II <br />