Wisconsin Highway Commission (1934). Official Highway Map of Wisconsin(PDF) (Map). 1:887,040. Madison: Wisconsin Highway Commission. Retrieved February 6, 2021 – via Wikimedia Commons.
State Highway Commission of Wisconsin (January 1935). Official Highway Map of Wisconsin(PDF) (Map). 1:887,040. Madison: State Highway Commission of Wisconsin. Retrieved February 6, 2021 – via Wikimedia Commons.
State Highway Commission of Wisconsin (January 1947). Official Highway Map of Wisconsin(PDF) (Map). 1:887,040. Madison: State Highway Commission of Wisconsin. Retrieved February 6, 2021 – via Wikimedia Commons.
State Highway Commission of Wisconsin (January 1948). Official Highway Map of Wisconsin(PDF) (Map). 1:887,040. Madison: State Highway Commission of Wisconsin. OCLC232303069. Retrieved February 6, 2021 – via Wikimedia Commons.
wisconsindot.gov
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 6, 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 6, 2021.
State Highway Commission of Wisconsin (January 1948). Official Highway Map of Wisconsin(PDF) (Map). 1:887,040. Madison: State Highway Commission of Wisconsin. OCLC232303069. Retrieved February 6, 2021 – via Wikimedia Commons.
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 6, 2021.