Gore, J. A. 1991. Distribution and abundance of nesting least terns and black skimmers in northwest Florida. Florida Field Naturalist 19(3):65-96.

Margules, C.R. and M.P. Austin. Eds. 1991. Nature conservation: cost effective biological surveys and data analysis. Csiro, Australia.

Hill, N. P. and J. M. Hagan, III. 1991. Population trends of some northeastern North American landbirds: a half century of data. Wilson Bulletin 103:165-182.

S91SIVTANMUS, Legacy reference. Physical copy not yet located.

Nordyke, K. A., and S. W. Buskirk. 1991. Southern red-backed vole, Clethrionomys gapperi, populations in relation to stand succession and old-growth character in the central Rocky Mountains. Can. Field-Nat. 105:330-334.

Snell, R. R. 1991b. Variably plumaged Icelandic herring gulls reflect founders not hybrids. Auk 108:329-341.

Advanced Sciences, Inc. 1991. Final preliminary draft Environmental Impact Statement (affected environment and non-EMP related environmental and socioeconomic consequences sections) for the relocation of the Woodbridge Research Facility Electromagnetic Pu

Helmers, D.L. 1991. Habitat use by migrant shorebirds and invertebrate availability in a managed wetland complex. M.S. Thesis, Univ. of Missouri Columbia. 135pp.

Reed, S. et al. 1991. Unpublished field notes from Astragalus kerrii/Echinocereus fendleri var kuenzleri survey on 22 May- 31 May 1991.

Toone, R. A. 1991. Speyeria nokomis nokomis: Great Basin Silverspot Butterfly. Pages 21-24 in Literature Review for Special Status Invertebratess Existing on or near lands administered by the U.S.D.I. Bureau of Land Management in Utah. Utah Natural Herita

Smith, W. P. 1991. Odocoileus virginianus. Am. Soc. Mamm., Mammalian Species No. 388:1-13.

Tate, G.R. 1991. Population dynamics, reproductive ecology, and conservation of two insular populations of the short-eared owl in Massachusetts. University of Massachusetts, Boston, Massachusetts. M.S. thesis. 107 pp.

Gila National Forest. 1991. Threatened, Endangered and Sensitive Plant Program report on Allium gooddingii, Rumex orthoneurus and Senecio quarens.

Madrid, B. Arvedson, C. (1991) 1881 Mexican Spotted Owl Inventory Form. Silver City Ranger District, Gila National Forest, USFS. 2 p.

Sivinski, R. and K. Lightfoot. 1991. NM rare plant occurrence record data sheet of 28 June 1991 for Cypripedium pubescens. EMNRD, Santa Fe, NM.

Black, C. and J. Black. 1991. Field survey to Gray Ranch - Indian Creek Canyon on 24 June 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #34 29 May, 1991.

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

Muldavin, E. 1991. Organ Mountains vegetation survey, 1991. New Mexico Natural Heritage Program

Perry, J. P. 1991. The Pines of Mexico and Central America. Timber Press.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #12 27 May, 1991.

Muldavin, E. 1991. Organ Mountains vegetation survey.

Belant, J. L., and R. K. Anderson. 1991. Common loon, GAVIA IMMER, brood habitat use in northern Wisconsin. Can. Field-Nat. 105:372-375.

Collins, J. T. 1991. Viewpoint: a new taxonomic arrangement for some North American amphibians and reptiles. SSAR Herpetol. Review 22:42-43.

Fuller, T. K. 1991. Effect of snow cover on wolf activity and prey selection in north central Minnesota. Canadian J. Zoology 69:283-287.

Johnson, A. S. 1991. Will lobo come home? Defenders 66(1):10-17.

Martin, K., and J. Parker. 1991. Mississippi kites reborn in Tennessee. The Tennesse Conservationist LVII(3):5-10.

Resetarits, W. J., Jr. 1991. Ecological interactions among predators in experimental stream communities. Ecology 72:1782-1793.

Smith, T. S., J. T. Flinders, and D. S. Winn. 1991. A habitat evaluation procedure for Rocky Mountain bighorn sheep in the Intermountain West. Great Basin Nat. 51:205-225.

Dunmire, W.W. 1991. T&E and sensitive plant survey, Ladron Mountains ACEC, Socorro Resource Area. Prepared for the BLM by the Nature Conservancy, NM Field Office. February 1, 1991.

Jennings, R. et al. 1991. Unpub. field notes for April 8-11, 1991 trip to Alamosa Warm Springs, Beaverhead, Cooney Tanks, Gillette Tank, Reserve and Tularosa River. 6 pp.

Sivinski, R. 1991. New Mexico rare plant occurrence record data sheet for Hymenoxys brachyatis. NM Forestry Division, Santa Fe, NM. June 24, 1991.

Adkins, R. M., et al. 1991. Hybrid breakdown in Peromyscus leucopus and examination of the recombinational-breakdown model. J. Mamm. 72:535-541.

DeGraaf, R.M., V.E. Scott, R.H. Hamre, L. Ernst, and S.H. Anderson, 1991. Forest and Rangeland Birds of the United States: natural history and habitat use. Agriculture Handbook 688, USDA Forest Service. January 1991.

Byers, S. M., and J. R. Cary. 1991. Discrimination of mallard strains on the basis of morphology. J. Wildl. Manage. 55:580-586.

Gibeau, M. L., and P. C. Paquet. 1991. Evaluation of Telazol for immobilization of black bears. Wildlife Society Bull. 19:400-402.

Johnson, B. K., F. G. Lindzey, and R. J. Guenzel. 1991. Use of aerial line transect surveys to estimate pronghorn populations in Wyoming. Wildl. Soc. Bull. 19:315-321.

Nudds, T. D., and R. W. Cole. 1991. Changes in populations and breeding success of boreal forest ducks. J. Wildl. Manage. 55:569-573.

Sandercock, F.K. 1991. Life history of coho salmon (Oncorhynchus kisutch). Pages 395-445 in C. Groot and L. Margolis, editors. Pacific salmon life histories. University of British Columbia Press, University of British Columbia, Vancouver. xv + 564 pp.

Bartley, D. M., and G. A. E. Gall. 1991. Genetic identification of native cutthroat trout (Oncorhyncuhs clarki) and introgressive hybridization with introduced rainbow trout (O. mykiss) in streams associated with the Alvord Basin, Oregon and Nevada. Copei

Emlen, J. T. 1991. Divergence in the foraging responses of birds on two Bahama islands. Ecology 62:289-95.

Holechek, J.L. 1991. Chihuahuan desert rangeland, livestock grazing, and sustainability. Rangelands. 13(3):115-120.

Randi, E., et al. 1991. Allozyme divergence and phylogenetic relationships within the Strigiformes. Condor 93:295-301.

Stutchbury, B. J. 1991. Coloniality and breeding biology of purple martins (PROGNE SUBIS HESPERIA) in saguaro cacti. Condor 93:666-675.

Holmes, A.M., R.R. Tasker, Q. F. Hess, A.J. Hanks, 1991. The Ontario Butterfly Atlas. Toronto Entomologists Association, 167 pp.

Robbins, S. D., Jr. 1991. Wisconsin Birdlife: Population and Distribution Past and Present. University of Wisconsin Press, Madison, Wisconsin.

Williams, L. R., and G. N. Cameron. 1991. Geomys attwateri. Am. Soc. Mamm., Mammalian Species No. 382:1-5.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #8 23 May, 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #1 on 22 April 1991.

Madrid, B. Arvedson, C. (1991) 1991 Mexican Spotted Owl Daytime Follow-up Visit Form. Silver City Ranger District, Gila National Forest, USFS. 2 p.

Schemnitz, S.D. 1991. Summary of Gould's turkey observations Gray Ranch - Animas and San Luis Mts. Unpub table for NMSU Dept of Fishery and Wildlife Sciences. 4 pp.

DeBruin, E. Sept 1991. Special plant site survey form, New Mexico for Perityle cernua.

Bailowitz, R. A. and J. P. Brock. 1991. Butterflies of Southeastern Arizona. Sonoran Arthropod Studies, Inc., Tucson, AZ. 342 pp.

Bork, A. M., C. M. Strobeck, F. C. Yeh, R. J. Hudson and R. K. Slamon. 1991. Genetic relationship of wood and plains bison based on restriction fragment length polymorphisms. Canadian Journal of Zoology 69: 43-48.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop # 1A, 21 May, 1991

Cronin, M. A. 1991b. Mitochondrial and nuclear genetic relationships of deer (Odocoileus spp.) in western North America. Can. J. Zool. 69:1270-1279.

S91SPESBNMUS, Legacy reference. Physical copy not yet located.

Grubb, T. G., and R. M. King. 1991. Assessing human disturbance of breeding bald eagles with classification tree models. J. Wildlife Management 55:500-511.

Meehan, W.R. (ED) 1991. Influences of forest and rangeland management on Salmonid fishes and their habitats. American Fish Soc. Spe. Pub. 19, Bethesda, MD.

Hussell, D. J. T. 1991a. Fall migrations of alder and willow flycatchers in southern Ontario. Journal of Field Ornithology 62(2):260-270.