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Brooks, J. 2007. Pecoes River Drainage Fish Collections for the Calander Year 2006. United States Department of the Interior. Fish and Wildlife Service. New Mexico Fishery Resources Office. 26 p.
Birnbaum, S. J. 2001. Sneed's pincushion cactus (Escobaria sneedii var. sneedii) localities in New Mexico. Texas Parks and Wildlife. Austin, Texas. 2 pages.
Norton, Bryan G. 1987. Why preserve natural variety?. Princeton University Press, Princeton, New Jersey.. 281 p.
Defenders of Wildlife and Center for Wildlife Law. 1998. State endangered species acts: Past, present, and future. Defenders of Wildlife; February 1998.. 126 p.
Lee-Chadde, S., L. F. Huenneke. 1997. Rare plants of the Sacramento Mountains. Dept. of Biology, New Mexico State University, Las Cruces, NM 88003. Produced for the Rocky Mountain Forest and Range Experiment Station. pp. 114.
Rutman, S. 1992. Handbook of Arizona's endangered, threatened, and candidate plants. U.S. Fish and Wildlife Service, Phoenix, Arizona.
Peterson, S.J. 1982. Threatened and endangered plants of Colorado. U.S. Fish and Wildlife Service, Denver, CO. 35 pp.
United States Fish and Wildlife Service. 1996. Endangered and Threatened Wildlife and Plants: Establishment of a non-essential experimental population of black-footed ferrets in Aubry Valley Arizona. Federal Register. 61(55):11320-11336.
New Mexico Department of Game and Fish. 2002. New Mexican Wildlife of Concern Status and Distribution. New Mexico Department of Game and Fish, Conservation Services Division. 71 p.
Poole, J.M., and D.H. Riskind. 1987. Endangered, threatened, or protected native plants of Texas. Texas Parks Wildlife Dept., Austin, TX.