Minnesota State Legislature (2010). "§ 161.114, Constitutional Trunk Highways". Minnesota Statutes. Minnesota Office of the Revisor of Statutes. Retrieved October 18, 2010.
Minnesota 1950 Official Highway Map (Map). Minnesota Department of Highways. January 1, 1950. § C-3 through C-11. Retrieved November 26, 2018.
1955 Official Road Map of Minnesota (Map). Cartography by The H.M. Gousha Co. Minnesota Department of Highways. January 1, 1955. § C-3 through C-10. Retrieved November 26, 2018.