Ohio Department of Highways (1969). Official Highway Map(PDF) (Map). c. 1:563,200. Columbus: Ohio Department of Highways. OCLC5673562, 7448779. Retrieved March 21, 2011.
Ohio Department of Highways (1969). Official Highway Map(PDF) (Map). c. 1:563,200. Columbus: Ohio Department of Highways. OCLC5673562, 7448779. Retrieved March 21, 2011.