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DeBruin, E. 1990. Field survey to Organ Mts, Fillmore Canyon on May 10, 1990.

Rosenburg, C. P. 1990a. Barn owl nest trays and boxes. Virginia Department Game and Inland. Fish. Educational sheet, Richmond, Virginia. Unpublished. 3 pp.

Allen, J. Tudek, B. (1990) Assorted Mexican Spotted Owl Forms. Silver City Ranger District, Gila National Forest, USFS. 83 p.

Gila National Forest. 1990. Reserve Ranger District Spotted Owl habitat description - form 2.

Sugg, D.W. 1990. Unpublished listing of amphibians specimens from MSB. 5 pp.

Brooks, B. L. and S. A. Temple. 1990a. Habitat availability and suitability for loggerhead shrikes in the Upper Midwest. Am. Midl. Nat. 123: 75-83.

Frederick, P. C., et al. 1990. Relative abundance and habitat preferences of least bitterns (IXOBRYCHUS EXILIS) in the Everglades. Florida Field Nat. 18:1-20.

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Mehlhop, P. 1990. Field survey to Gray Ranch - Clanton Draw to Cloverdale to Larson. 22 Oct. 1990.

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Lincoln National Forest. 1990. Mexican Spotted Owl daytime follow-up visit form, survey for Mexican Spotted Owl.

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Blokpoel, H., and R. M. G. Hamilton. 1990. Effects of applying white mineral oil to chicken and gull eggs. Wildl. Soc. Bull. 17:435-441.

Ely, D. C. 1990. A pair of pileated woodpeckers in the Wichita Mountains Wildlife Refuge, Comanche County, Oklahoma. Bull. Okla. Ornithol. Soc. 23:24-5.

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Frey, J. K., and D. W. Moore. 1990. Nongeographic variation in the Mexican vole (Microtus mexicanus). Transactions of the Kansas Academy of Science 93:97-109.

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Painter, C. 1990. Map of Animas Peak that specifies Crotalus willardi obscurus sighting localities.

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