"Driver's Boon: Int. 296 Opening Finishes City Freeway, Links Kalamazoo, Muskegon". The Grand Rapids Press. December 17, 1962. p. A1. OCLC9975013.
worldcat.org
Michigan Department of Transportation (2013). Pure Michigan: State Transportation Map (Map). c. 1:221,760. Lansing: Michigan Department of Transportation. Grand Rapids inset. OCLC42778335 and 861227559.