^State Highway Commission of Wisconsin (1957). Wisconsin Highway Map(PDF) (Map). 1:887,040. Madison: State Highway Commission of Wisconsin. Retrieved February 7, 2021 – via Wikimedia Commons.
^State Highway Commission of Wisconsin (1958). Wisconsin Highway Map(PDF) (Map). 1:887,040. Madison: State Highway Commission of Wisconsin. Retrieved February 7, 2021 – via Wikimedia Commons.
^Wisconsin Department of Transportation Division of Highways (1989). Wisconsin Highway Map(PDF) (Map) (1989–1990 ed.). 1:823,680. Madison: Wisconsin Department of Transportation. Retrieved February 7, 2021.
^Wisconsin Department of Transportation Division of Highways (1991). Wisconsin Highway Map(PDF) (Map) (1991–1992 ed.). 1:823,680. Madison: Wisconsin Department of Transportation. OCLC25418391, 781234246, 27016238. Retrieved February 7, 2021.