Michigan Legislature (1915) [enacted May 13, 1913]. "Chapter 91: State Reward Trunk Line Highways". In Shields, Edmund C.; Black, Cyrenius P. & Broomfield, Archibald (eds.). The Compiled Laws of the State of Michigan. Vol. 1. Lansing, Michigan: Wynkoop, Hallenbeck and Crawford, State Printers. pp. 1868–72. OCLC44724558. Retrieved May 1, 2019 – via Google Books.
Michigan Department of Transportation (2019). Truck Operator's Map(PDF) (Map). c. 1:221,760. Lansing: Michigan Department of Transportation. Kalamazoo inset. Retrieved April 24, 2019.
Michigan Department of Transportation (2019). Truck Operator's Map(PDF) (Map). Scale not given. Lansing: Michigan Department of Transportation. § M9. Retrieved April 24, 2019.
Michigan Department of Transportation (2005). National Highway System: Kalamazoo Urbanized Area(PDF) (Map). Scale not given. Lansing: Michigan Department of Transportation. Archived from the original(PDF) on December 31, 2010. Retrieved January 1, 2011.
Michigan State Highway Department (July 1, 1919). State of Michigan (Map). Scale not given. Lansing: Michigan State Highway Department. Lower Peninsula sheet. OCLC15607244. Retrieved April 24, 2019 – via Michigan History Center.
Michigan State Highway Department (September 15, 1924). Official Highway Condition Map (Map). [c. 1:823,680]. Lansing: Michigan State Highway Department. Archived from the original on April 25, 2019. Retrieved April 24, 2019 – via Archives of Michigan.
Michigan Department of Transportation (2005). National Highway System: Kalamazoo Urbanized Area(PDF) (Map). Scale not given. Lansing: Michigan Department of Transportation. Archived from the original(PDF) on December 31, 2010. Retrieved January 1, 2011.
Michigan State Highway Department (September 15, 1924). Official Highway Condition Map (Map). [c. 1:823,680]. Lansing: Michigan State Highway Department. Archived from the original on April 25, 2019. Retrieved April 24, 2019 – via Archives of Michigan.
Michigan Legislature (1915) [enacted May 13, 1913]. "Chapter 91: State Reward Trunk Line Highways". In Shields, Edmund C.; Black, Cyrenius P. & Broomfield, Archibald (eds.). The Compiled Laws of the State of Michigan. Vol. 1. Lansing, Michigan: Wynkoop, Hallenbeck and Crawford, State Printers. pp. 1868–72. OCLC44724558. Retrieved May 1, 2019 – via Google Books.
Michigan State Highway Department (July 1, 1919). State of Michigan (Map). Scale not given. Lansing: Michigan State Highway Department. Lower Peninsula sheet. OCLC15607244. Retrieved April 24, 2019 – via Michigan History Center.