1951 Official Road Map of Minnesota (Map). Cartography by The H.M. Gousha Company. Minnesota Department of Highways. January 1, 1951. § H20. Archived from the original on August 25, 2011. Retrieved January 6, 2011.
1954 Official Road Map of Minnesota (Map). Cartography by The H.M. Gousha Company. Minnesota Department of Highways. January 1, 1954. § H20. Archived from the original on August 25, 2011. Retrieved January 6, 2011.
1956 Official Road Map of Minnesota (Map). Cartography by The H.M. Gousha Company. Minnesota Department of Highways. 1956. § H20. Archived from the original on August 25, 2011. Retrieved January 6, 2011.
Minnesota Department of Transportation (August 14, 2014). "Statewide Trunk Logpoint Listing"(PDF). St. Paul: Minnesota Department of Transportation. Retrieved November 24, 2015.
1951 Official Road Map of Minnesota (Map). Cartography by The H.M. Gousha Company. Minnesota Department of Highways. January 1, 1951. § H20. Archived from the original on August 25, 2011. Retrieved January 6, 2011.
1954 Official Road Map of Minnesota (Map). Cartography by The H.M. Gousha Company. Minnesota Department of Highways. January 1, 1954. § H20. Archived from the original on August 25, 2011. Retrieved January 6, 2011.
1956 Official Road Map of Minnesota (Map). Cartography by The H.M. Gousha Company. Minnesota Department of Highways. 1956. § H20. Archived from the original on August 25, 2011. Retrieved January 6, 2011.