Brooks, Bill. 1998 "Texas Horned Lizards" Horned
lizard conservation society. (online) Available: http://homepage.psy.
utexas.edu/homepage/staff/brooks/hlcs/index.htm
Electronic Library. 1994 "Horned Lizards" Concise Colombia Electronic
Encyclopedia. (online) Available: http:// www. Encyclopedia.com/articles/06056.htm
Blackspear & Richerson. May 1999. "Ant Diet of the Texas Horned Lizard (phrynosoma
cornutum) from the Chihuahuan Desert". Texas Journal of Science (journal),
No. 51(2). Department of Biology, Sul Ross State University.
Ballinger, Royce. Dec. 1974 "Reproduction of the Texas Horned Lizard, phrynosoma
cornutum". Herpetologica (journal), Vol. 30, No. 4.
Manaster, Jane. 1997. Horned Lizards. (Book)
University of Texas Press, Austin. 1st Edition.
Montanucci, Richard. June 1989. " The Relationship of Morphology to diet in the
Horned Lizard Genus Phrynosoma". Herpetologica (Journal), No. 45(2).
Department of Biological Sciences, Clemson University.
Whiting, Dixon & Murray. June 1993. " Spatial Distribution of Texas Horned
Lizards Relative to Habitat and Prey". The Southwestern Naturalist (Journal),
No. 38(2). Department of Wildlife and Fisheries Science.