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<br />'. <br /> <br />10 <br /> <br />one refuge population, to ensure the <br />continued existence of humpback chub in <br />captivity, <br /> <br />LITERATURE CITED <br />United States Fish and Wildlife Service <br />(USFWS). 2000. Policy regarding <br />controlled propagation of species <br />listed under the Endangered Species <br />Act. Federal Register 65(183): <br />56916-56922. <br />Van Haverbeke, D. R. and R. L. Simmonds <br />Jr. 2004. The feasibility of <br />developing a program to augment the <br />population of humpback chub (Gila <br />cypha) in Grand Canyon. Final <br />Report by the U.S. Fish and Wildlife <br />Arizona Fishery Resources Office, <br />Flagstaff. 64 pp. <br /> <br />00659 <br />