Arizona
Mikesic, D. and C. LaRue. 2003. Recent status and distribution of red foxes (Vulpes vulpes) in northeastern Arizona and southeastern Utah. The Southwestern naturalist. 48(4):624-634.
Biggs, T.H., R.S. Leighty, S.J. Skotnicki, T.R. Orr, and S.M. Richard. 1999. Digital Maps and Geographic Datab ase of the Geology, Geomorphology, and Soils of the San Bernardino Valley, Southeastern Arizona.
Rutman, S. 1992. Handbook of Arizona's endangered, threatened, and candidate plants. U.S. Fish and Wildlife Service, Phoenix, Arizona.
Malcom, J., W. R. Radke, and B. K. Lang. 2005. Habitat Associations of the San Bernardino Springsnail, Pyrgulopsis bernardina (Hydrobiidae). Journal of Freshwater Ecology. Volume 20. Pages 71-77.
Tonne, P. and M. Howard. 2009. A GIS of field observations for Chihuahua scurf pea (Pediomelum pentaphyllum) in Arizona and New Mexico. Natural Heritage New Mexico, University of New Mexico, Albuquerque, NM.
Neville, T. 2003. In-house DVD for World Wildlife Fund Projects: Peloncillo 2001 and Rio Grande 2003.
Muldavin, E.H., R.L. DeVelice, and F. Ronco Jr. 1996. A classification of forest habitat types, southern Arizona and portions of the Colorado Plateau. USDA Forest Service Gen. Tech. Report RM-GTR-287. Rocky Mountain Forest and Range Experiment Station, F
Nesom, G. 1978. Erigeron hessii sp. nov. and Erigeron kuschei Eastwood (Compositae), two closely related narrow endemics from the southwestern United States. Brittonia 30(4): 440-446.
Crosswhite, F. S. 1967. Revision of Penstemon Section Habroanthus (Scrophulariaceae 1: Conspectus. The American Midland Naturalist. Herbarium, Department of Botany, University of Wisconsin, Madison 53706. 3 p.
Prather, J.W., R.F. Noss, T.D. Sisk. 2008. Real versus perceived conflicts between restoration of ponderosa pine forests and conservation of the Mexican spotted ow. Forest Policy and Economics 10 (2008) 140-150 pp.