^Hill, R.T. 1887. The topography and geology of the Cross Timbers and surrounding regions in Northern Texas. The American Journal of Science, 3rd Series, 33:291-303.
^Greene, A.C. 1998. Sketches from the five states of Texas. College Station: Texas A&M University Press, 176 pp.
^Hammond's Complete World Atlas. New York: C.S. Hammond and Company, 1951.