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References Berger, J. 1986. Wild Horses of the Great Basin: Social Competition and Population Size. Chicago, 111.: University of Chicago Press. Bowling, A. T., and R. W. Touchberry. 1988. Wild horse parentage and population genetics. Final research report to the U.S. Department of the Interior, Bureau of Land Management, January 15. University of California at Davis. Photocopy. Ginther, O. J. 1979. Reproductive Biology of the Mare, Basic and Applied Aspects. Ann Arbor, Mich.: McNaughton and Gunn. National Research Council. 1982. Wild and Free-Roaming Horses and Burros: Final Report. Washington, D.C.: National Academy Press. Plotka, E. D., U. S. Seal, T. C. Eagle, C. S. Asa, J. R. Tester, and D. B. Siniff. 1987. Rapid reversible immobilization of feral stallions using etorphine hydrochloride, xylazine hydrochloride and atropine sulfate. Journal of Wildlife Diseases 23:471-478. Plotka, E. D., T. C. Eagle, S. J. Gaulke, J. R. Tester, and D. B. Siniff. 1988a. Hematologic and blood chemical characteristics of feral horses from three management areas. Journal of Wildlife Diseases 24:231- 239. Plotka, E. D., T. C. Eagle, D. N. Vevea, A. L. Koller, D. B. Siniff, J. R. Tester, and U. S. Seal. 1988b. Effects of hormone implants on estrus and ovulation in feral mares. Journal of Wildlife Diseases 24:507- 514. Plotka, E. D., D. N. Vevea, T. C. Eagle, D. B. Siniff, and J. R. Tester. 1989. Ovarian function in captive feral mares. Journal of Wildlife Diseases 25(4): 574-579. Siniff, D. B., J. R. Tester, T. C. Eagle, R. A. Garrott, and E. D. Plotka. 1988a. Fertility control in wild horses. Progress report to the U.S. 38
REFERENCES 39 Department of the Interior, Bureau of Land Management, November 30. University of Minnesota and Marshfield Medical Foundation. Photocopy. Siniff, D. B., J. R. Tester, T. C. Eagle, R. A. Garrott, and E. D. Plotka. 1988b. Fertility control in wild horses. Progress report to the U.S. Department of the Interior, Bureau of Land Management, March 31. University of Minnesota and Marshfield Medical Foundation. Sweeney, L. 1989. Recommendation to terminate the U of M research contract on fertility control in wild horses. Memorandum, U.S. Department of the Interior, Bureau of Land Management, December 14. Photocopy. U.S. Congress. 1971. Wild Horse and Burro Protection Act. 16 U.S.C. 1331-1340. U.S. Congress. 1978. Public Rangelands Improvement Act. 43 U.S.C. 1901-1908. U.S. Department of the Interior. 1987. Investigation report into the deaths of wild horses in the Clan Alpine herd management area. Bureau of Land Management, December 17. Photocopy. U.S. Department of the Interior. 1989. Adminstration of the Wild Free- Roaming Horse and Burro Act, 7th Report to Congress, 1988. Wash- ington, D.C.: U.S. Government Printing Office. Wolfe, M. L., L. C. Ellis, and R. MacMullen. 1989. Reproductive rates of feral horses and burros. Journal of Wildlife Management 53:916-924.
