Edwards, P., and D. Stacy. 1968. The development of nestling curve-billed thrashers. Department of Ecology and Evolutionary Biology report, University of Arizona, Tucson.

Cody, M.L. 1968. Interspecific territoriality among hummingbird species. Condor 70:270-271.

Brown, P. R. 1968. Residents of the Golden State. International Turtle and Tortoise Society Journal. 2(6):28-9.

Gloyd, L.K. 1968. The union of Argia fumipennis (Burmeister, 1839) with Argia violacea (Hagen, 1861) and the recognition of three subspecies (Odonata). Occasional papers of the Museum of Zoology, University of Michigan. 658:1-6.

Foerster, R.E. 1968. The sockeye salmon, Oncorhynchus nerka. Bulletin of the Fisheries Research Board of Canada 162 xv + 422 pp.

Tyler, J.D. 1968. Distribution and vertebrate associates of the black-tailed prairie dog in Oklahoma. Ph.D. dissertation. University of Oklahoma, Norman.

Krause, H. 1968. McCown's Longspur. Pages 1564-1597 in O.L. Austin, Jr., editor. Life histories of North American cardinals, grosbeaks, buntings, towhees, finches, sparrows, and allies, part 3. Dover Publications, Inc., New York, NY.

Ficken, M. S., and R. W. Ficken. 1968. Territorial relationships of blue-winged warblers, golden-winged warblers, and their hybrids. Behaviour 28:149-181.

Tyler, J. D. 1968. Distribution and vertebrate associates of the black-tailed prairie dog in Oklahoma. Ph.D dissertation, University of Oklahoma, Norman.

Mead, R. A. 1968. Reproduction in western forms of the spotted skunk (genus Spilogale). Journal of Mammalogy 49: 373-390.

Gross, A.O. 1968. Dickcissel. Pages 158-191 in O.L. Austin, Jr., editor. Life histories of North American cardinals, grosbeaks, towhees, finches, sparrows, and allies, part 1. Dover Publications, Inc., New York, NY.

Arledge, J.G. and R. Boice. 1968. Economics of water intake in packrats (Neotoma albigula and Neotoma micropus). Abstract: Barren and wet habitats. Amer Zool 8(4): 751.

Ligon, J.D. 1968. The biology of the elf owl, MICRATHENE WHITNEYI. Univ. Michigan Mus. Zool., Misc. Publ. No. 136.

Packard, R. L. 1968. An ecological study of the fulvous harvest mouse in eastern Texas. American Midland Naturalist 79:68-88.

Leege, T. A. 1968. Natural movements of beavers in southeastern Idaho. Journal of Wildlife Management 32:973-976.

Gibbons, J. W. 1968c. Reproductive potential, activity and cycles in the painted turtle, Chrysemys picta. Ecology 49:399-409.

Baumgartner, A.M. 1968. Harris' Sparrow. Pages 1249-1273 in Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies. A.C. Bent, editor. U.S. National Museum Bulletin 237, Part 3. Washington, DC.

Munz, P.A. 1968. Supplement to a California flora. Univ. California Press. Berkeley. 224 pp.

Hutchins, B. 1968. Survey form for Malaxis ehrenbergii. 1 p.

Lein, M.R. 1968. The breeding biology of the Savannah Sparrow, PASSERCULUS SANDWICHENSIS (Gmelin), at Saskatoon, Saskatchewan. M.S. thesis. University of Saskatchewan, Saskatoon, Saskatchewan. 171 pp.

Root, O. M. 1968. Spizella pallida (Swainson). Pages 1186-1208 in A. C. Bent, editor. Life histories of North American cardinals, grosbeaks, buntings, towhees, finches, sparrows, and allies. U.S. National Museum Bulletin 237.

Mayhew, W. W. 1968. Biology of desert amphibians and reptiles. Pp. 195-356 in Brown, G. W. Jr. (ed.). Desert biology. Vol. 1. 1968. Academic Press, New York, NY.

Horn, H. S. 1968. The adaptive significance of colonial nesting in the Brewer's Blackbird. Ecology 49:682-694.

Fairfield, G.M. 1968. Chestnut-collared Longspur. Pages 1635-1652 in O.L. Austin, Jr., editor. Life histories of North American cardinals, grosbeaks, buntings, towhees, finches, sparrows, and allies. Dover Publications, Inc., New York, NY.

Orians, G.H., Christman. 1968. Behavior of redwinged, tri-colored, and yellow headed blackbirds. Berkeley. 301 pp.

Zweifel, R.G. 1968a. Rana boylii. Catalogue of American Amphibians and Reptiles 71:1-2.

Little, R. McKirdy, H. 1968. Statewide Fisheries Investigations, Rancho Del Rio Grande Grant, Carson National Forest, Project numbers F-22-R-7 & 8. Job Number A-1. Job Completion Report, Research Project Segment, as Required by Federal Aid in Fish Restora

Minckely, W.L. and J.E. Deacon. 1968. Southwestern fishes and the enigma of 'endangered species'. Science 159:1424-32.

Humphrey, P. S., D. Bridge, and T. E. Lowjoy. 1968. A technique for mist-netting in the forest canopy. Bird-Banding 39:43-50.

Ficken, M. S., and R. W. Ficken. 1968. Courtship behavior of Blue-winged Warblers and their hybrids. Wilson Bulletin 80:161-172.

Coulter, M. W., and W. R. Miller. 1968. Nesting biology of Black Ducks and Mallards in northern New England. Vermont Fish and Game Department Bulletin 68-2.

Anderson, J.D. 1968. A comparison of the food habits of Ambystoma macrodactylum sigillatum, Ambystoma macrodactylum croceum, and Ambystoma tigrinum califoriense. Herpetologica 24(4):273-284.

Mueller, H. C. and D. D. Berger. 1968. Sex ratios and measurements of migrant goshawks. Auk 85:431-436.

Larson, J. S., and F. C. Van Nostrand. 1968. An evaluation of beaver aging techniques. Journal of Wildlife Management 32:99-103.

Gibbons, J.W. 1968a. Population structure and survivorship in the painted turtle, Chrysemys picta. Copeia 1968(2): 260-268.

Baepler, D.H. 1968. Lark Sparrow. Pages 886-902 in A.C. Bent, editor. Life histories of North American cardinals, grosbeaks, buntings, towhees, finches, sparrows, and allies. Dover Publications Inc., New York, NY.

Netboy, A. 1968. The Atlantic salmon, a vanishing species. Faber and Faber, London. 457 pp.

Ligon, J. D. 1968. Observations on Strickland's Woodpecker, DENDROCOPOS STRICKLANDI. Condor 70:83-84.

Lane, J. 1968. Baird's sparrow (AMMODRAMUS BAIRDII). In A. C. Bent. Life histories of North American cardinals, grosbeaks, huntings, towhees, finches, sparrows and allies, part two. U.S. National Museum Bulletin. 237:603-1248.

U.S. Fish and Wildlife Service (USFWS). 1967. Native fish and wildlife: endangered species. Federal Register 32(48):4001.

Regan, D. P.. . Aspects of the life history and distribution of the Jemez Mountains salamander. University of New Mexico.Master's Thesis. .

Gehlbach, F.R. 1967. Vegetation of the Guadalupe escarpment, New Mexico-Texas. Ecology. 48(3):404-419.

Ficken, M. S., and R. W. Ficken. 1967. Singing behaviour of blue-winged and golden-winged warblers and their hybrids. Behaviour 28:149-181.

Baker, J.A. 1967. The peregine. 191 pp.

Taylor, W. K. 1967. Breeding biology and ecology of the Verdin, AURIPARUS FLAVICEPS (Sundevall). Ph.D. dissertation, Arizona State University, Tempe.

van Tighem, K. 1967. Destruction of the Prairie Falcon at Calgary, Alberta. Blue Jay 25:108.

Heckenlively, D. B. 1967. Role of song in territoriality of black-throated sparrows. Condor 69:429-430.

Greenlaw, J. S., and J. Swinebroad. 1967. A method for constructing and erecting areal nets in a forest. Bird-Banding 38:114-9.

Keefe, J.F. 1967. The world of the oppossum. 144 pp.

Zweiacker, P. 1967. Aspects of the life history of the shovelnose sturgeon, Scaphirhynchus platorynchus (Rafinesque), in the Missouri River. University of South Dakota, Vermillion, South Dakota. MA Thesis. 46 pp.

Hill, E. P. 1967. Homing by a cottontail rabbit. Journal of Mammalogy 48:648.

Lowe, C. H., D. S. Hinds, and E. A. Halpern. 1967. Experimental catastrophic selection and tolerances to low oxygen concentration in native Arizona freshwater fishes. Ecology. 48:1013-1017.

Zweifel, R.G. 1967. Eleutherodactylus augusti. Catalogue of American Amphibians and Reptiles. 41:1-4.

Priegel, G. R. 1967c. The freshwater drum-its life history, ecology, and management. Wisconsin Department of Natural Resources Publication 236. 15 pp.

Mager, W. 1967. Nestling swallow-tailed kite banded on Key Largo, recovered in Brazil. Florida Naturalist 40:13-14.

Speirs, J.M., and R. Orenstein. 1967. Bird populations in fields of Ontario County, 1965. Canadian Field-Naturalist 81:175-183.

Manuwal, D. A. 1967. Observations on a localized duck sickness in the Delta Marsh: summer 1964. Wilson Bull. 79:219-222.

Barr, T. C., Jr., and J. R. Reddell. 1967. The arthropod cave fauna of the Carlsbad Caverns region, New Mexico. Southwestern Naturalist 12:253-274.

Storer, R. W. 1967. The patterns of downy grebes. Condor 69:469-78.

Miller, R. R., and C. H. Lowe. 1967. Part 2: The fishes of Arizona. Pages 133-151 in Lowe, C. H. (editor). The Vertebrates of Arizona. University of Arizona Press, Tuscon, Arizona.