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O'Brien, S.J. & Mayr, E. "Species hybridization and protection of endangered animals." Science, 253 (1991): 251-252.
Genetic Conservation
Reading, R. P. & Miller, B. (Eds.). (2000). Endangered animals: A reference guide to conflicting issues. Westport, CT: Greenwood Press.
Gray Wolves
Smith, D. W., & Phillips, M. K. (2000). Northern Rocky Mountain wolf. In Endangered animals: A reference guide to conflicting issues, Reading, R. P. & Miller, B. (Eds.) (pp. 219-223). Westport, CT: Greenwood Press.
Gray Wolves
Endangered Species Research and Conservation (2005) Lao Endangered Species, Wildlife Conservation Society, (N.A.) Extracted on October 16, 2005 from http://www.wcs.org/international/Asia/laos/laosendangeredspecies
Laos and its Poverty
"Endangered Species Act of 1973." U.S. Fish and Wildlife Service. June 1994. http://endangered.fws.gov/policy/pol003.html Hawes, A. & M. Huy. "Giant Pandas." Smithsonian National Zoological Park. 2001. http://nationalzoo.si.edu/Animals/GiantPandas/
Cloning Endangered Species
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