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. doi:10.2475/ajs.s3-33.196.291. ISSN1945-452X.
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David Leip’s Atlas of U.S. Presidential Elections; Jeff Davis County, 2000
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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. doi:10.2475/ajs.s3-33.196.291. ISSN1945-452X.