Michigan State Highway Department & Rand McNally (December 1, 1938). Official Michigan Highway Map (Map) (Winter ed.). [c. 1:850,000]. Lansing: Michigan State Highway Department. § H10. OCLC12701143. Retrieved October 17, 2019 – via Michigan History Center.
newspapers.com
"'Orphan Roads' Sent Back to Highway Chief". The Evening News. Sault Ste. Marie, Michigan. Associated Press. December 23, 1939. p. 3. Retrieved March 1, 2023 – via Newspapers.com.
"Delta, Missaukee Will Take Over State Roads". The Herald-Palladium. Benton Harbor, Michigan. Associated Press. August 19, 1943. p. 9. Retrieved March 1, 2023 – via Newspapers.com.