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LITERATURE CITED <br />American Ornithologists; Union 1957. Checklist of North American <br />birds. Lord Baltimore Press, Baltimore, Maryland. <br />American Ornithologists; Union 1973. Thirty-second supplement to <br />the AOU checklist of North American birds. Auk 90:411-419. <br />American Ornithologists; Union 1973. Corrections and additions <br />to the 32nd supplement to the checklist of North American <br />birds. Auk 90:887. <br />American Ornithologists; Union 1976. Thirty-third supplement to <br />the AOU checklist of North American birds. Auk 93:875-879. <br />Armstrong, D. M. 1972. Distribution of mammals in Colorado. <br />• Univ, of Kans. Mus. Nat. Hist., Lawrence, Kansas. <br />Bailey, A. M. and R. J. Niedrach 1965. Birds of Colorado. Denver <br />Mus. Nat. Hist., Denver, Colorado. <br />Burkhard, W. T. and T. A. Lytle. 1978 Analysis of Fish and Wildlife <br />Resources: West Divide Project Area. Colorado Division of <br />Wildlife, Grand Junction, December 1978. <br />Cloninger, J. S. 1979. Manager Oil Shale Geology, Union Oil <br />Company, Grand Junction, Colorado. Personal communication. <br />Colony Development Operation 1974. An environmental impact analysis <br />for a shale oil complex at Parachute Creek, Colorado. Volume I, <br />Part 1 and Appendix 12. <br />Colorado Division of Wildlife 1978. Essential habitat for threatened <br />and endangered wildlife in Colorado. <br />l..J <br />H-19 <br />