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<br />United States Fish and Wildlife Service (USFWS). 1989. List of field names and data <br />codes, upper Colorado River basin database. U.S. Fish and Wildlife Service, <br />Grand Junction, CO. pp.47 <br /> <br />Valdez, R.A., and W. Masslich. 1989. Winter habitat study of endangered fish-Green <br />River. Final Report submitted to the Upper Colorado River Basin Recovery <br />Implementation Program by BIOIWEST, Inc., Logan, UT. <br /> <br />Welcomme, R. L. 1985. River fisheries. Food and Agriculture Organization of the <br />United Nations, Fisheries Technical Paper 262. p. 330. <br /> <br />34 <br />