^Arkansas State Highway Department (April 1, 1926). State of Arkansas Showing System of State Highways(TIF) (Map). 1:500,000. Little Rock: Arkansas State Highway Commission. Retrieved November 29, 2020 – via Arkansas GIS Office.
^ abSystem Information and Research Division (2016). "Arkansas Road Log Database". Arkansas State Highway and Transportation Department. Archived from the original(MDB) on August 29, 2017. Retrieved November 29, 2020.
^General Highway Map, Benton County, Arkansas(PDF) (Map). 1:62500. Cartography by Planning and Research Division. Arkansas State Highway and Transportation Department. August 20, 2012. Retrieved January 30, 2013.
^General Highway Map, Newton County, Arkansas(PDF) (Map). 1:62500. Cartography by Planning and Research Division. Arkansas State Highway and Transportation Department. September 16, 1996. Archived from the original(PDF) on September 29, 2011. Retrieved January 30, 2013.
^ abGeneral Highway Map, Boone County, Arkansas(PDF) (Map). 1:62500. Cartography by Planning and Research Division. Arkansas State Highway and Transportation Department. December 22, 2011. Retrieved January 30, 2013.