System Information & Research Division (2019). Annual Average Daily Traffic Estimates (Map). Arkansas Department of Transportation. Retrieved January 27, 2022.
Transportation Planning and Policy Division (September 17, 2021). State Highway Route and Section Map, Grant County(PDF) (Map). 1:62,500. Cartography by GIS Section. Little Rock: Arkansas Department of Transportation. Retrieved January 27, 2022. {{cite map}}: |author= has generic name (help)
Arkansas State Highway and Transportation Department (2015). "Arkansas Road Log Database"(MDB). Arkansas State Highway and Transportation Department. Retrieved March 27, 2016.
Planning and Research Division (April 2, 2014) [November 20, 2007]. General Highway Map, Grant County, Arkansas(PDF) (Map) (Revised ed.). 1:62,500. Little Rock: Arkansas State Highway and Transportation Department. OCLC911951976. Retrieved February 5, 2022.
American Association of State Highway and Transportation Officials (2019). Guidelines for Geometric Design of Low-Volume Roads (2nd ed.). Washington, DC: American Association of State Highway and Transportation Officials. pp. 2–8. ISBN978-1-56051-726-9. OCLC1140203768.
Planning and Research Division (April 2, 2014) [November 20, 2007]. General Highway Map, Grant County, Arkansas(PDF) (Map) (Revised ed.). 1:62,500. Little Rock: Arkansas State Highway and Transportation Department. OCLC911951976. Retrieved February 5, 2022.