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• REFERENCES <br />Colorado Department of Health-Water Quality Control Divison. 1980. Classifications <br />and Numeric Standards, Upper Colorado River Basin and North Platte River <br />(Planning Region 12) 3.3.0. <br />National Academy of Sciences, National Academy of Engineering. 1974. Water Quality <br />Criteria. U.S. Government Printing Office, Washington, D. C. <br />U.S. Environmental Protection Agency. 1979. Methods for Chemical Analysis of Water <br />and Wastes (EPA 600/4-79-020). Environmental Monitoring and Support Laboratory, <br />Environmental Research Center, Cincinnati, Ohio. <br />U.S. Environmental Protection Agency. 1976a. National Interim Primary Drinking Water <br />Regulations. EPA-570/9-76-003, 159 p. <br />U.S. Environmental Protection Agency. 1976b. Qualit Criteria for Water. U.S. <br />Government Printing Office, Washington, D.C., 2 p. <br />Wyoming Department of Environmental Quolity/Land Quality Division. 1977. Guideline <br />No. 4 (Revised). Cheyenne, Wyo., 5 p. <br />u <br />• <br />7-10-27 Revised September 28, 1984 <br />