Sivinski, R., and K. Lightfoot. 1991. NM rare plant occurrence record data sheet of 18 June 1991 for Erigeron acomanus. EMNRD, Santa Fe, NM.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #3 on 19 July 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #15 on 4 May 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-Flora Vista, stop #3 on 23 April 1991.

New Mexico Natural Heritage Program. 1991. Field map for 1991 Gilia formosa survey on USGS 7 1/2' topo map, Cedar Hill quad.

DeBruin, E. 1991. Field survey to Farmington Resource Area- Aztec- stop #11 on 22 April 1991.

Brennan, L. A. 1991. How can we reverse the northern bobwhite population decline? Wildl. Soc. Bull. 19:544-555.

Dawson, J. W., and R. W. Mannan. 1991a. Dominance hierarchies and helper contributions in Harris' hawks. Auk 108:649-660.

Laycock, W.A. 1991. Stable states and thresholds of range condition on North American rangelands: a viewpoint. Journal of Range Management. 44(5):427-433.

Nesom, G. L. 1991. A new species of Erigeron (Asteraceae: Asterae) from Northwestern New Mexico. Phytologia 71(5): 416-419.

Rogers, M. A. 1991b. Evolutionary differentiation within the northern Great Basin pocket gopher, Thomomys townsendii. II. Genetic variation and biogeographic considerations. Great Basin Nat. 51:127-152.

Taylor, W. K., and M. A. Kershner. 1991. Breeding biology of the great crested flycatcher in central Florida. J. Field Ornithol. 62:28-39.

ECoPlan Inc. 1991? An analysis of wetlands and endangered plant species along the Chama River: and their responses to fluctuating water levels. Part of study of Chama Wild and Scenic River w/ USFS and other agencies.

Kirkeminde, M. 1991. Letter regarding recent visits to existing Allium gooddingii locations in the Gila National Forest dated 2 Jan 1992. 3 pp.

Skaggs, K. 1991. Personal communication to Ellen DeBruin Regarding Oenothera Organensis.

Aldrich, J. W., and F. C. James. 1991. Ecogeographic variation in the American robin. Auk 108:230-249.

Confer, J.L., K. Knapp, D. Coker, M. Armstrong, and J. Doherty. 1991. The rapidly changing distribution of the Golden-winged Warber (VERMIVORA CHRYSOPTERA) in central New York. Kingbird 41:5-10.

Grzybowski, J. A. 1991. A closer look: the black-capped vireo. Birding, August 1991, pp. 216-219.

Keast, A., and S. Saunders. 1991. Ecomorphology of the North American ruby-crowned (REGULUS CALENDULA) and golden-crowned (R. SATRAPA) kinglets. Auk 108:880-888.

Oldham, J.C. and H.M. Smith. 1991. The generic status of the smooth green snake, Opheodrys vernalis. Bull. Md. Herp. Soc. 27(4):201-215.

Scott, A. C., and M. Bekoff. 1991. Breeding behavior of evening grosbeaks. Condor 93:71-81.

Garrott, R. A., T. C. Eagle, and E. D. Plotka. 1991a. Age-specific reproduction in feral horses. Can. J. Zool. 69:738-743.

Jackson, G. D. 1991. Field identification of teal in North America: female-like plumages. Part I: blue-winged, cinnamon, and green-winged teal. Birding 23(3):124-133.

Mayer, P. M., and M. R. Ryan. 1991b. Electric fences reduce mammalian predation on piping plover nests and chicks. Wildlife Society Bull. 19:59-63.

Reichel, J. D., and P. O. Glass. 1991. Checklist of the birds of the Mariana Islands. Elepaio 50:3-11.

Tyus, H. M. 1991. Ecology and management of the Colorado squawfish. Pages 379-402 in W. L. Minckley and J. E. Deacon, editors. Battle against extinction: native fish management in the American West. Univ. Arizona Press, Tucson.

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

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.

Altenbach, J. Scott. 1991. Untitled letter about "Lava Cave." Department of Biology, University of New Mexico. October 1991. 2 pp.

Mehlhop, P., et al. 1991. Status and distribution of Erigeron rhizomatus (Zuni Fleabane) within a designated satellite image reflectance value in the Datil and Sawtooth Mts. Unpubl. report by New Mexico Natural Heritage Program for Cibola National Forest.

Sivinski, R. 1991. Letter to Douglas F. Irving of Chapman, Wood, and Griswold, Inc. Concerning proposed mining impact on Townsendia gypsophila occurring in Sec. 16, T15NR1E.

Clayton, P. 1991. Field Ssurvey to Ball Ranch - Stop #22 on 5 Aug 1991.

Buhlmann, K. A., and M. R. Vaughan. 1991. Ecology of the turtle Pseudemys concinna in the New River, West Virginia. Journal of Herpetology 25:72-78.

Dunbar, D. L., et al. 1991. Status of the spotted owl, STRIX OCCIDENTALIS, and barred owl, STRIX VARIA, in southwestern British Columbia. Canadian Field-Naturalist 106:464-468.

Dennis, R. 1991. Ospreys. Colin Baxter Photography. 48 pp.

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #3 on 22 April 1991.

Price, R. M. 1991. Senticolis, S. triaspis. Society for the Study of Amphibians and Reptiles 525.1-525.4.

Mongold, R. 1991. Field survey to Capitan Mts - Sawset Canyon, 31 May 1991.

Kingsley, N.P., and T.H. Nicholls. 1991. Raptor habitat in the midwest. Pages 185-194 in Proc. midwest raptor management symposium and workshop. National Wildlife Federation, Washington, DC.

Marsh, P.C., M.E. Douglas, W.L. Minckley and R. Timmons. 1991. Rediscovery of Colorado squawfish, Ptychocheilus lucius (Cyprinidae), in Wyoming. Copeia 1991:1091-1092.

Propst, D. L., and K. R. Bestgen. 1991. Habitat and biology of the loach minnow, Tiaroga cobitis, in New Mexico. Copeia 1991:29-38.

Britton, B. 1991. Unpublished plant occurrence record for Allium gooddingii at Gooseberry Canyon, Sept. 1988. map.

Kirkeminde, M. 1991. Unpub field notes for survey to Mogollon Mts - Hall Canyon on 31 July 1991. 1 p + map.

Youngman, P. M., and F. W. Schueler. 1991. Martes nobilis is a synonym of Martes americana, not an extinct Pleistocene-Holocene species. J. Mamm. 72:567-577.

Skaggs, K. 1991. Plant/animal occurrence record - cooperator forms for Perityle cernua and Coryphantha organensis.

Cockrum, E. L., and Y. Petryszyn. 1991. The long-nosed bat, Leptonycteris: an endangered species in the southwest? Occas. Pap. Mus. Texas Tech Univ. (142):1-32.

Anderson, B. and M. Boyles. 1991. Plant/animal occurrence form for Allium gooddingii in 1988. 1 p.

Gustafson, M. E. 1991. Diet and habitat selection in Ohio nesting barn owls (TYTO ALBA). M.S. thesis, Ohio State Univ. ix + 92 pp.

Marron, et al. 1991. An unpublished survey on threatened and endangered plants including San Juan County [no title, incomplete document]. 52 pp.

Sivinski, R. 1991. NM rare plant occurrence record data sheet of 8 July 1991 for Mammillaria viridiflora EMNRD, Santa Fe, NM.

Gibbs, J. P., J. R. Longcore, D. G. McAuley, and J. K. Ringelman. 1991. Use of wetland habitats by selected nongame waterbirds in Maine. Fish and Wildlife Reservation 9, Fish and Wildlife Service.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #12 on 23 July 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-Armenta Canyon, stop #4 on 7 May 1991.

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

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.

New Mexico Natural Heritage Program. 1991. Field map for 1991 Gilia formosa survey on USGS 7 1/2' topo map, east fork Kutz Canyon Quad.

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

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