Indiana Department of Transportation (July 2016). Reference Post Book(PDF). Indianapolis: Indiana Department of Transportation. Retrieved January 14, 2017.
Indiana State Highway Commission (September 30, 1931). State Highway System of Indiana(PDF) (Map). Indianapolis: Indiana State Highway Commission. Retrieved May 30, 2017 – via Indiana University Bloomington Libraries.
Indiana State Highway Commission (September 30, 1932). State Highway System of Indiana(PDF) (Map). Indianapolis: Indiana State Highway Commission. Retrieved May 30, 2017 – via Indiana University Bloomington Libraries.
"State Begins Care New Roads". The Daily Reporter. Greenfield, IN. March 23, 1932. Retrieved May 31, 2017 – via Newspapers.com.
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Indiana State Highway Commission (January 1, 1932). State Highway System of Indiana (Map). 1:660,000. Indianapolis: Indiana State Highway Commission. OCLC53092152. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (February 1933). State Highway System of Indiana (Map). 1:618,000. Indiana State Highway Commission. OCLC53355434. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (January 1934). State Highway System of Indiana (Map). 1:600,000. Indianapolis: Indiana State Highway Commission. OCLC63673890. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (January 1935). State Highway System of Indiana (Map). 1:615,000. Indiana State Highway Commission. OCLC63899341. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1939). State Highway System of Indiana (Map). 1:633,600. Indiana State Highway Commission. OCLC64016573. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1941). State Highway System of Indiana (Map). 1:633,600. Indiana State Highway Commission. OCLC64574634. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1947). State Highway System of Indiana (Map). 1:620,000. Indiana State Highway Commission. OCLC865083739. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1948). State Highway System of Indiana (Map). 1:620,000. Indiana State Highway Commission. OCLC64382516. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1966). Indiana State Highway System (Map) (1966–1967 ed.). 1:640,000. Indiana State Highway Commission. OCLC65209231. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1967). Indiana State Highway System (Map) (1967–1968 ed.). 1:640,000. Indiana State Highway Commission. OCLC65221593. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1937). State Highway System of Indiana (Map). Indiana State Highway Commission. Retrieved May 31, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1938). State Highway System of Indiana (Map). 1:630,000. Indiana State Highway Commission. OCLC64017142. Retrieved May 31, 2017 – via Indiana State Library and Historical Bureau.
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search.worldcat.org
Indiana State Highway Commission (January 1, 1932). State Highway System of Indiana (Map). 1:660,000. Indianapolis: Indiana State Highway Commission. OCLC53092152. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (February 1933). State Highway System of Indiana (Map). 1:618,000. Indiana State Highway Commission. OCLC53355434. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (January 1934). State Highway System of Indiana (Map). 1:600,000. Indianapolis: Indiana State Highway Commission. OCLC63673890. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (January 1935). State Highway System of Indiana (Map). 1:615,000. Indiana State Highway Commission. OCLC63899341. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1939). State Highway System of Indiana (Map). 1:633,600. Indiana State Highway Commission. OCLC64016573. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1941). State Highway System of Indiana (Map). 1:633,600. Indiana State Highway Commission. OCLC64574634. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1947). State Highway System of Indiana (Map). 1:620,000. Indiana State Highway Commission. OCLC865083739. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1948). State Highway System of Indiana (Map). 1:620,000. Indiana State Highway Commission. OCLC64382516. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1966). Indiana State Highway System (Map) (1966–1967 ed.). 1:640,000. Indiana State Highway Commission. OCLC65209231. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana State Highway Commission (1967). Indiana State Highway System (Map) (1967–1968 ed.). 1:640,000. Indiana State Highway Commission. OCLC65221593. Retrieved May 30, 2017 – via Indiana State Library and Historical Bureau.
Indiana Department of Transportation (1995). Indiana Transportation Map (Map) (1995–1996 ed.). 1:633,600. Indianapolis: Indiana Department of Transportation. OCLC46648036.
Indiana State Highway Commission (1938). State Highway System of Indiana (Map). 1:630,000. Indiana State Highway Commission. OCLC64017142. Retrieved May 31, 2017 – via Indiana State Library and Historical Bureau.
worldcat.org
Indiana Department of Transportation (1993). Indiana State Highway System (Map) (1993–1994 ed.). 1:633,600. Indianapolis: Indiana Department of Transportation. OCLC25483579, 80128837, 872557094, 220912931.