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Transportation Planning and Programming Division (n.d.). "Business U.S. Highway No. 67-K". Highway Designation Files. Texas Department of Transportation. Retrieved December 25, 2022.
Transportation Planning and Programming Division (n.d.). "Business U.S. Highway No. 67-M". Highway Designation Files. Texas Department of Transportation. Retrieved December 25, 2022.
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Planning and Research Division (March 28, 2012). "Arkansas Road Log Database". Arkansas State Highway and Transportation Department. Archived from the original(MBD) on June 23, 2011. Retrieved April 13, 2012.
General Highway Map, White County, Arkansas(PDF) (Map). 1:62500. Cartography by Planning and Research Division. Arkansas State Highway and Transportation Department. July 24, 2008. Archived from the original(PDF) on March 3, 2016. Retrieved May 26, 2012.