Clayton, P. 1991. Field survey to Ball Ranch - Stop #11 on 23 July 1991.

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

Black, C. and J. Black. 1991. Field survey to Gray Ranch - Animas Peak NE - site #1 on 23 June 1991.

Reed, S. and P. Hyder 1991. USGS San Patricio 7.5' topo map with Mammillaria heyderii from 22 May 1991 field survey for TNC.

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

DeBruin, E. 1991. Field survey to Farmington Resource Area-Armenta Canyon, stop #1 on 24 April 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area - Hampton Arroyo ACEC plot #18 on 6 May 1991.

Gerhardt, R. P., M. A. Vasquez, and D. M. Gerhardt. 1991. Breeding biology, food habits, and siblicide of swallow-tailed kites. Pages 65-71 in Maya Project, Progress Report 4 (D. F. Whitacre, W. A. Burham, and J. P. Jenny, eds.). The Peregrine Fund, Boise

Bull, E. L. 1991. Summer roosts and roosting behavior of Vaux's Swifts in old-growth forests. Northwestern Naturalist 72:78-82.

Dawson, J. W., and R. W. Mannan. 1991b. The role of territoriality in the social organization of Harris' hawks. Auk 108:661-672.

Geist, V. 1991. Phantom subspecies: the wood bison BISON BISON "ATHABASCAE" Rhoades 1897 is not a valid taxon, but an ecotype. Arctic 44:283-300.

Leachman, B. and F. Knopf. 1991. Mountain plover gets attention. Fish and Wildlife News, June-July-August 1991, pp. 15, 22.

Newton, I., I. Wyllie, and A. Asher. 1991. Mortality causes in British barn owls TYTO ALBA, with a discussion of aldrin-dieldrin poisoning. Ibis 133:162-169.

Rotenberry, J. T., and J. A. Wiens. 1991. Weather and reproductive variation in shrubsteppe sparrows: a hierarchical analysis. Ecology 72:1325-1335.

Theberge, J. B. 1991. Ecological classification, status, and management of the gray wolf, Canis lupus, in Canada. Canadian Field-Naturalist 105:459-463.

Anderson, D.L. 1991. Plant collection log sheet for ^&Talinum longipes - log #41: Mockingbird Gap. 25 July 1991.

Fisher, R.E. 1991. Notes from phone conversation with Margaret Estabrook of the Reserve Ranger District, Gila National Forest on 7 Oct 1991.

Madrid, R. (1991) 1991 Mexican Spotted Owl Daytime Follow-up Visit Forms. Silver City Ranger District, Gila National Forest, USFS. 6 p.

Snow, P. Herrera, D. Miller, S. Ocana, P. 1991. 1990 Mexican Spotted Owl Inventory Form, El Rito Ranger District, Carson National Forest. USFS.

Unknown (1991) 1991 Humbolt Demographic Study Sighting. Retrieved from silver City Ranger Distict, Gila National Forest, USFS. 3 p.

Beier, P. 1991. Cougar attacks on humans in the United States and Canada. Wildl. Soc. Bull. 19:

Dennis, B., P. L. Munholland, and J. M. Scott. 1991. Estimation of growth and extinction parameters for endangered species. Ecological Monographs 61:115-143.

Hamer, D., S. Herrero, and K. Brady. 1991. Food and habitat used by grizzly bears, Ursus arctos, along the Continental Divide in Waterton Lakes National Park, Alberta. Canadian Field-Naturalist 105:325-329.

Kozie, K. D., and R. K. Anderson. 1991. Productivity, diet, and environmental contaminants in bald eagles nesting near the Wisconsin shoreline of Lake Superior. Arch. Environ. Contam. Toxicol. 20:41-48.

Pekins, P. J., F. G. Lindzey, and J. A. Gessaman. 1991. Physical characteristics of blue grouse winter use-trees and roost sites. Great Basin Nat. 51:244-248.

Smith, H. M., G. A. Hammerson, J. J. Roth, and D. Chizar. 1991. Distributional addenda for the smooth green snake (Opheodrys vernalis) in western Colorado, and the status of its subspecies. Bull. Maryland Herp. Soc. 27(2):99-106.

Garrott, R. A., D. B. Siniff, and L. L. Eberhardt. 1991b. Growth rates of feral horse populations. J. Wildl. Manage. 55:641-648.

Jhala, Y. V., and R. H. Giles, Jr. 1991. The status and conservation of the wolf in Gujarat and Rajasthan, India. Conservation Biology 5(4):476-483.

Mitchell, J. C. 1991. Amphibians and reptiles. Pages 411-76 in K. Terwilliger (coordinator). Virginia's Endangered Species: Proceedings of a Symposium. McDonald and Woodward Publishing Company, Blacksburg, Virginia.

Ridgway, M. S., B. J. Shuter, and E. E. Post. 1991b. The relative influence of body size and territorial behaviour on nesting asynchrony in male smallmouth bass, Micropterus dolomieui (Pisces: Centrarchidae). Journal of Animal Ecology 60:665-681.

Van Sickle, W. D., and F. G. Lindzey. 1991. Evaluation of a cougar population estimator based on probability sampling. J. Wildl. Manage. 55:738-743.

Ownbey, G. B., and T. Morley. 1991. Vascular plants of Minnesota: A checklist and atlas. University of Minnesota Press, Minneapolis.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #13 on 23 July 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #41 28 May, 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area- ACEC Area #13 on 25 April 1991.

Britton, B. 1991. Unpublished plant element occurrence record for Allium gooddingii in BS Canyon, Sept. 1988. + map.

Henry, A. 1991. Unpub. letter to Pat Mehlhop regarding Aplomado Falcon sightings on the Gray Ranch. February 15, 1991.

Painter, C.W. 1991. Letter from Charlie Painter, Endangered Species biologist for NM Dept. Game and Fish to Pat Mehlhop of NMNHP dated 4 Sept. 1991 regarding Sceloporus scalaris localities in Hidalgo Co. 1 pp.

Sullivan, R.M. 1991. Live trapping of potential habitat for the meadow jumping mouse (Zapus hudsonius luteus) at the San Jose drain outfall area. Preliminary environmental report submitted to the Marron/Taschek/Knight Corporation.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #15 on 29 July 1991.

Albuja, L. 1991. Lista de vertebrados del Ecuador. Escuela Politécnica XVI:163-203.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #9 23 May, 1991.

Burger, J., and M. Gochfeld. 1991. Human activity influence and diurnal and nocturnal foraging of sanderlings (CALIDRIS ALBA). Condor 93:259-265.

DeBruin, E. 1991. Field survey to Farmington Resource Area- ACEC Area #12 on 25 April 1991.

Echelle, A. A. 1991. Conservation genetics and genic diversity in freshwater fishes of western North America. Pages 141-153 in W. L. Minckley and J. E. Deacon, eds. Battle against extinction: native fish management in the American West. University of Ariz

Stoltz, J., and J. Schnell (eds.). 1991. Trout: The Wildlife Series. Stackpole Books, Harrisburg, Pennsylvania. 384 pp.

Knight, P.J., and A.C. Cully. 1991. A new species of Astragalus (Fabaceae) from southeastern New Mexico. Southwestern Naturalist 36(2): 198-200.

Mattson, D. J., and M. M. Reid. 1991. Conservation of the Yellowstone grizzly bear. Conservation Biology 5(3):364-372.

Anderson, J. (1991) Map of Red Canyon MSO Survey # 2. Sandia Ranger District, Cibola National Forest, USFS. 2 p.

Quinn, T. W., G. F. Shields, and A. C. Wilson. 1991. Affinities of the Hawaiian goose based on two types of mitochondrial DNA data. Auk 108:585-593.

DeBow, M.J. 1991. Letter to Jennifer Fowler-Propst of US Fish and Wildlife Service concerning discovery of two Pediocactus papracanthus. 16 Oct 1991.

Mills, Scott G. 1991. Miscellaneous notes on Coryphantha scheeri robustrispina. United States Forest Service (USFS) Regional Office, Albuquerque, NM. p.30.

The Nature Conservancy. Dec 9 1991. Addendum: Site Prospectus: Natural Land Protection Act, site identification program, presented to Natural Lands Protection Committee.

Zink, R. K., et al. 1991a. Mitochondrial DNA variation and the taxonomic status of the large-billed savannah sparrow. Condor 93:1016-1019.

Gibbons, J. W., and R. D. Semlitsch. 1991. Guide to the reptiles and amphibians of the Savannah River Site. Univ. of Georgia Press, Athens. xii + 131 pp.

Brozka, R.J. 1991. Progress report, 1988-1990: Land Condition-Trend Analysis Program, White Sands Missile Range, New Mexico. Prepared by U.S. Army Corps of Engineers, Construction Engineering Research Laboratory, Environmental Division. October 1991.

Howard, M. 1991. Sensitive threatened and endangered plant data form. May 8, 1991.

Paul, L. (1991) Unpublished Letter to Forest Supervisor, Subject: Peregrine Falcon Eyrie (Code Name Agua Dulce). Lincoln Supervisor's Office, Lincoln National Forest, USFS. 3 p.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #24 on 6 Aug 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-east fork Kutz Canyon-stop #13 on 7 May 1991.