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<br />Tyus, H. M., R. L. Jones, and L. A. Trinca, "Green River rare and endangered fIsh studies, <br />1982-1985," U.S. Fish and Wildlife Service, Final Report, Colorado River Fishes Monitoring Project, <br />Vernal, Utah, 1987. <br /> <br />Tyus, H. M. and C. W. McAda, "Migration, movements, and habitat preferences of Colorado <br />squawfish, Ptychocheilus lucius, in the Green, White and Yampa Rivers," Colorado and Utah, <br />Southwestern Naturalist 29:289-299, 1984. <br /> <br />6 <br />