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^ abcSystem Information and Research Division (2014). "Arkansas Road Log Database". Arkansas State Highway and Transportation Department. Archived from the original(MDB) on August 29, 2017. Retrieved March 27, 2016.
^Arkansas State Highway and Transportation Department (February 17, 2015). General Highway Map, Washington County, Arkansas(PDF) (Map). 1:62500. Arkansas State Highway and Transportation Department. Retrieved December 5, 2016.