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Michigan State Highway Department (July 1, 1948). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. §§ C7–D7. OCLC12701120. Retrieved October 17, 2019 – via Michigan History Center.
Michigan Department of Transportation (1987). Yes Michigan: Official Transportation Map (Map). c. 1:918,720. Lansing: Michigan Department of Transportation. § C7. OCLC12701177. Retrieved October 17, 2019 – via Michigan History Center.
Michigan Department of Transportation (1988). Yes Michigan: Department of Transportation Map (Map). c. 1:918,720. Lansing: Michigan Department of Transportation. § C7. OCLC42778335. Retrieved October 17, 2019 – via Michigan History Center.
Michigan Department of Transportation (January 2011). Michigan's Railroad System(PDF) (Map). Lansing: Michigan Department of Transportation. Archived from the original(PDF) on April 9, 2011. Retrieved February 1, 2011.
Office of Federal Lands Highway. "Forest Highways Fact Sheet"(PDF). Federal Highway Administration. Archived from the original(PDF) on February 15, 2013. Retrieved July 28, 2010.
Office of Federal Lands Highway (December 18, 2009). "Forest Highways". Federal Highway Administration. Archived from the original on August 18, 2010. Retrieved July 28, 2010.
Michigan State Highway Department & Rand McNally (June 1, 1936). Official Michigan Highway Map (Map). [c. 1:850,000]. Lansing: Michigan State Highway Department. §§ C7–D7. OCLC12701143.
Michigan State Highway Department & Rand McNally (April 15, 1940). Official Michigan Highway Map (Map) (Spring ed.). [c. 1:850,000]. Lansing: Michigan State Highway Department. §§ C7–D7. OCLC12701143.
Michigan State Highway Department (October 1, 1945). Official Highway Map of Michigan (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. §§ C7–D7. OCLC554645076.
Michigan State Highway Department (July 1, 1948). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. §§ C7–D7. OCLC12701120. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (July 1, 1949). Michigan Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. §§ C7–D7. OCLC12701120.
Michigan Department of Transportation (1987). Yes Michigan: Official Transportation Map (Map). c. 1:918,720. Lansing: Michigan Department of Transportation. § C7. OCLC12701177. Retrieved October 17, 2019 – via Michigan History Center.
Michigan Department of Transportation (1988). Yes Michigan: Department of Transportation Map (Map). c. 1:918,720. Lansing: Michigan Department of Transportation. § C7. OCLC42778335. Retrieved October 17, 2019 – via Michigan History Center.
Michigan Department of Transportation (2011). Pure Michigan: State Transportation Map (Map). c. 1:975,000. Lansing: Michigan Department of Transportation. §§ C7–D7. OCLC42778335, 786008212.
Michigan State Highway Department & Rand McNally (December 15, 1936). Official Michigan Highway Map (Map) (Winter ed.). [c. 1:850,000]. Lansing: Michigan State Highway Department. §§ C7–D7. OCLC12701143, 317396365. Retrieved October 17, 2019 – via Michigan History Center.