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• <br />• <br />LITERATURE CITED <br />American Ornithologists' Union. 1957. Checklist of North American birds. <br />Fifth Edition, Baltimore, Maryland. <br />American Ornithologists' Union. 1973.. Thirty- second supplement to the <br />American Ornithologists' checklist of North American birds. A.O.U. <br />Committee on Classification and Nomenclature, The Auk, 90(2)': <br />(411 -419). April 1973. <br />Borrow, D.J. and R.E. White. 1970, A field guide to the insects. Houghton - <br />Xiifflon Company, Boston, Massachusetts. 404 pp. <br />Call, M.W. 1978. Nesting habits and surveying techniques for common <br />western raptors. Bureau of Land Management, Denver Service Center, <br />Technical Note TN -316. 115 pp. <br />Clark, T.W. 1978. Current status of black- footed ferret in Wyoming. <br />Journal of Wildlife Management. 42(1): 128 -134. <br />cook, A.H. 1949. Fur - bearer investigations. New 'York State Conservation <br />Department, ment, P -R Project Retort 1 -R, Supplement G. <br />Division of Wildlife. n.d. Wildlife in danger. Colorado Division of <br />Wildlife, ,Non -game Section. 31 pp. <br />Federal Register, Vol. 44, No. 12. January 17, 1979. List of endangered <br />and threatened wildlife and plants. U.S. Government Printing Office, <br />Washington, D.C. <br />Hall, E.R. and K.R. Nelson. 1959. The mammas of North America. Ronald <br />Press Company, New York. 1,162 pp. <br />.Henderson, R.R., P.F. Springer, and R. Adrian. 1974. The black- footed <br />ferret in South Dakota. South Dakota Department of Came, Fish and <br />Parks, Technical Bulletin No. 4: 1 -37. <br />Hickey, J.J. 1942. Eastern populations of the duck hawk. Auk: (59) <br />176 -204. <br />Lechleitner, R.R. 1969. Wildlife mammals of Colorado. Pruett Publishing <br />Company, Boulder, Colorado. 254 pp. <br />Linduska, J.P. , ed. 1964. Waterfowl tomorrow. U.S. Government Printing <br />Office, Washington, D.C. 770 pp. <br />Linhart, S.B. and F.F. Knowlton. 1973. Determination of relative carnivore <br />densities in the western r'nited States. Annual Meeting American <br />Society of Mamralogists. 63. 9pp. <br />Lloyd, M. and R.J. Chelardi. 1964. A table for calculating the "equit- <br />ability" canponent of species diversity. Journal of Animal Ecology <br />33: 217 -255. <br />-52- <br />JUN 11198Q <br />