Ohio Department of Highways (1957). Ohio Highway Map(PDF) (Map). 1:633,600. Columbus: Ohio Department of Highways. OCLC5673562, 7444259. Retrieved September 23, 2013.
Ohio Department of Highways (1959). Ohio Official Highway Map(PDF) (Map) (1959–1960 ed.). 1:633,600. Columbus: Ohio Department of Highways. OCLC5673562, 13687960. Retrieved September 23, 2013.
Ohio Department of Highways (1961). Ohio Official Highway Map(PDF) (Map). 1:633,600. Columbus: Ohio Department of Highways. OCLC5673562, 54667348. Retrieved September 23, 2013.
Ohio Department of Highways (1957). Ohio Highway Map(PDF) (Map). 1:633,600. Columbus: Ohio Department of Highways. OCLC5673562, 7444259. Retrieved September 23, 2013.
Ohio Department of Highways (1959). Ohio Official Highway Map(PDF) (Map) (1959–1960 ed.). 1:633,600. Columbus: Ohio Department of Highways. OCLC5673562, 13687960. Retrieved September 23, 2013.
Ohio Department of Highways (1961). Ohio Official Highway Map(PDF) (Map). 1:633,600. Columbus: Ohio Department of Highways. OCLC5673562, 54667348. Retrieved September 23, 2013.