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Michigan Department of Transportation (2010). Uniquely Michigan: Official Department of Transportation Map (Map). c. 1:975,000. Lansing: Michigan Department of Transportation. §§ C4–D4, D5. OCLC42778335, 639960603.
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Wisconsin Department of Transportation Division of Highways (1980). Wisconsin Highway Map(PDF) (Map) (1980–1981 ed.). 1:823,680. Madison: Wisconsin Department of Transportation. §§ I6–I10. OCLC613423704, 77526920. Retrieved February 5, 2023.
Wisconsin Department of Transportation Division of Highways (1983). Wisconsin Highway Map(PDF) (Map) (1983–1984 ed.). 1:823,680. Madison: Wisconsin Department of Transportation. §§ I6–I10. OCLC713016540, 381172055. Retrieved February 5, 2023.
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