Mehlhop, P. 1991. Field survey to Mineral Creek on 27 June 1991.

DeBruin, E. and S. Reed. 1991. Field survey to Tularosa Mts - Cox Canyon on 26 July 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #17 24 May, 1991

DeBruin, E. 1991. Field survey to Farmington Resource Area-Kutz Canyon-stop #6B on 24 April 1991.

Horton, J. and C. Persichetty. 1991. Field survey to Capitan Mts. - Pierce Canyon Arroyo at Forest Rd. 57, 23 May 1991.

Afton, A. D., R. H. Hier, and S. L. Paulus. 1991. Lesser scaup diets during migration and winter in the Mississippi flyway. Can. J. Zool. 69:328-333.

Christiansen, J. L., and R. M. Bailey. 1991. The salamanders and frogs of Iowa. Iowa Department of Natural Resources, Nongame Technical Series (3):1-24.

Dolbeer, R. A. 1991. Migration patterns of Double-crested Cormorants east of the Rocky Mountains. Journal of Field Ornithology 62:83-93.

Howe, W.H. and F.L. Knopf. 1991. On the imminent decline of Rio Grande cottonwoods in cetnral New Mexico. South. Nat. 36:218-224.

The Nature Conservancy. 1991. Ball Ranch field map. USGS 7.5' topographic May - Hagan - 3510633.

Patterson, M. E., J. D. Fraser, and J. W. Roggenbuck. 1991. Factors affecting piping plover productivity on Assateague Island. J. Wildlife Management 55:525-531.

Medin, D.E., and W.P. Clary. 1991. Breeding bird populations in a grazed and ungrazed riparian habitat in Nevada. USDA Forest Service, Intermountain Research Station Research Paper INT-441. Ogden, UT.

Schulz, T.T., and W.C. Leininger. 1991. Nongame wildlife communities in grazed and ungrazed montane riparian sites. Great Basin Naturalist 51:286-292.

Wick, E. J., J. A. Hawkins, and T. P. Nesler. 1991. Occurrence of two endangered fishes in the Little Snake River, Colorado. Southwestern Naturalist 36:251-254.

Banci, V. 1991. Status report on the grizzly bear Ursus arctos horribilis. Committee on the Status of Endangered Wildlife in Canada (COSEWIC). 171 pp.

Gutierrez, R.J., D.R. Olson, and M.E. Seamans. 1991. Demography of two Mexican Spotted Owl (Strix occidentalis lucida) populations in Arizona and New Mexico: Preliminary results, 1991. Submitted by Department of Wildlife, Humboldt State University, Arcat

Hallock, L. A. 1991. Habitat utilization, diet and behavior of the eastern massasauga (Sistrurus catenatus) in southern Michigan. Masters thesis, Michigan State University, East Lansing.

New Mexico Dept of Game and Fish. 1991. NM fish specimen database. Unpub printout from NM Dept Game and Fish computerized fish database listing Cyprinodon pecosensis and C. tularosa specimens from various museums, dated 10 April 1991.

Painter, C.W. et al. 1991. The continuation of studies of the natural history of the New Mexico ridgenose rattlesnake Crotalus willardi obscurus, Gray Ranch NM, Unpubl. report for N.M. Dept Game and Fish submitted 15 Oct 91. 6 pp.

Unknown (1991) Spotted Owl Data Base Information. Retrieved from Silver City Ranger District, Gila National Forest, USFS. 58 p.

Browning, M. R. 1991. Taxonomic comments on the dunlin CALIDRIS ALPINA from northern Alaska and eastern Siberia. Bull. British Ornithologists Club 111:140-145.

Dolbeer, R. A., et al. 1991. Efficacy of two gas cartridge formulations in killing woodchucks in burrows. Wildl. Soc. Bull. 19:200-204.

Herkert, J.R. 1991b. Study suggests increases in restored prairie fragments to conserve breeding bird communities. Restoration and Management Notes 9:107.

Lyman, R. L. 1991. Late Quaternary biogeography of the pygmy rabbit (Brachylagus idahoensis) in eastern Washington. J. Mamm. 72:110-117.

Pinkowski, B. 1991. Wood Thrush. Pages 356-7 in R. Brewer, G. A. McPeek, and R. J. Adams Jr. (editors). The atlas of breeding birds of Michigan. Michigan State University Press, East Lansing, Michigan.

Walker, J. M., R. M. Abuhteba, and J. E. Cordes. 1991. Morphological and experimental verification of hybridization between all-female Cnemidophorus laredoensis B and gonochoristic Cnemidophorus gularis (Squamata: Teiidae). Herpetologica 47:152-164.

Collins, C.T., K. Corey, J. Pike, and L.R. Hays. 1991. The status and management of the Least Bell's Vireo within the Prado Basin, California, 1986-1990. Final Rep. to Orange County Water District, Fountain Valley, CA.

Conant, S., et al. 1991. A new tern (STERNA) breeding record for Hawaii. Pacific Sci. 45:348-354.

Goodloe, R. B., et al. 1991. Genetic variation and its management implications in eastern U.S. feral horses. J. Wildl. Manage. 55:412-421.

Landin, M.C. 1991. Needs, construction, and management of dredge material islands for wildlife. Pages 99-117. in Proceed. of the Coastal Nongame Workshop. Dawn Jenings (ed.) U.S. Fish and Wildl. Serv., Region 4, and Florida Game Fresh Water Fish Commissio

Payne, R. B. 1991. Natal dispersal and population structure in a migratory songbird, the indigo bunting. Evolution 45:49-62.

Smith, M. E., et al. 1991. Modification of stream ecosystem structure and function by beaver (Castor canadensis) in the Adirondack Mountains, New York. Canadian Journal of Zoology 69:55-61.

Carothers, S.W., and B.T. Brown. 1991. The Colorado River through the Grand Canyon. University of Arizona Press, Tucson, AZ.

U.S. Forest Service (USFS). 1991. Forest and rangeland birds of the United States: Natural history and habitat use. U.S. Department of Agriculture, Forest Service Agricultural Handbook 688. 625 pp.

Ernst, C. H., and J. F. McBreen. 1991c. Terrapene. Cat. Am. Amph. Rept. 511.1-511.6.

DeBruin, E. 1991. Field survey to Gila National Forest, Grouse Mountain - Stop #1 on 20 July 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #16 on 4 May 1991.

Muldavin, E. 1991. Gray Ranch vegetation survey, 1991. New Mexico Natural Heritage Program

Bureau of Land Management. 1991. Maps of USGS 7.5' top maps with transparencies showing Gilia formosa: existing pops, areas surveyed and potential distribution. Prepared from Paul Knight's 1986 field work maps.

Dunmire, W.W. 1991. T + E and sensitive plant survey Sawtooth ACEC Socorro Resource Area BLM. Unpublished report by TNC, NM Field Office. 9 p + maps.

Joyner-Griffith, M. A. 1991. Neonatal desert tortoise (GOPHERUS AGASSIZII) biology: analyses of morphology, evaporative water loss and nautral egg production followed by neonatal emergence in the central Mojave Desert. California State University, Domingu

Powell, A. N. 1991. Monitoring black tern populations in Minnesota in association with the USFWS Waterfowl Production Survey. unpublished report to Minnesota Department of Natural Resources Nongame Program.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #20 on 5 Aug 1991.

Blackwell, B. H., et al. 1991. Radio harness system for bobcat kittens. Great Basin Nat. 51:343-347.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #32 29 May, 1991.

Mehlhop, P. 1991. Field survey to Faywood Cienega on 28 April 1991.

Gall, L.F. 1991b. Evolutionary ecology of sympatric Catocala moths (Lepidoptera: Noctuidae). II. Sampling for wild larvae on their foodplants. Journal of Research on the Lepidoptera. 29(3):195-216.

Hands, H.M., M.R. Ryan and J.W. Smith. 1991. Migrant shorebird use of marsh, moist-soil, and flooded agricultural habitats. Wildl. Soc. Bull. 19:457- 464.

Montopoli, G. J., and D. A. Anderson. 1991. A logistic model for the cumulative effects of human intervention on bald eagle habitat. J. Wildlife Management 55:290-293.

Schweitzer, Dale F. 1991. The hickory feeding Catocala (Lepidoptera:Noctuidae) fauna in the absence of Carya ovata in southern New Jersey. Ent. News 102(4):165-172.

Anderson, J. Hall, D. (1991) 1991 Mexican Spotted Owl Dayime Follow-up Visit Form. Sandia Ranger District, Cibola National Forest, USFS. 2 p.

Frybarger, S. (1991) 1991 Mexican Spotted Owl Inventory Form. Retrieved from Silver City Ranger District, Gila National Forest, USFS. 36 p.

Orr, M.V. 1991. Threatened, endangered and sensitive plants, observation record for Pediocactus papyracanthus.

Unknown (1991) Multiple Bundled Mexican Spotted Owl Territory Data Sheets and Related Documents. Lincoln Supervisor's Office, Lincoln National Foresy, USFS. 519 p.

Sutherland, J. M. 1991. Effects of drought on American coot, FULICA AMERICANA, reproduction in Saskatchewan parklands. Canadian Field-Naturalist 105:267-273.

Lufkin, A., editor. 1991. California's salmon and steelhead, the struggle to restore an imperiled resource. University of California Press, Berkeley. 305 pp.

DeBruin, E. 1991. Astragalus kerrii questionable locality. Notes from personal communication from Ellen DeBruin to Robin Fisher on 12 Aug 1991. 1 pp.

Kirkeminde, M. 1991. Unpub field notes for survey to Mogollon Mts - Willow Creek on 11 Oct 1991. 1 p + map.

Sanchez, B. (1991) Collected 1991 Mexican Spotted Owl Daytime Follow-up Visit Forms. Retrieved from Silver City Ranger District, Gila National Forest, USFS. 126 p.

DeBruin, E. Sept 1991. Special plant survey form, NM for Coryphantha organensis in Organ Mts.