"Trumbull County Updates". ODOT. 2008. Archived from the original on February 26, 2012. Retrieved April 26, 2019. SR 0169R - Route Reversed, Overlap Removed, J.E. 8/17/2007
Ohio Department of Highways and Public Works (July 1923). Map of Ohio Showing State Routes(PDF) (Map). 1:760,320. Columbus: Ohio Department of Highways and Public Works. Retrieved March 28, 2019.
Ohio Department of Highways and Public Works (August 1, 1926). Map of Ohio Showing State Routes(PDF) (Map). 1:760,320. Columbus: Ohio Department of Highways and Public Works. OCLC5673562. Retrieved March 28, 2019.
Ohio Department of Highways and Public Works (June 1, 1927). Map of Ohio Showing State Routes(PDF) (Map). 1:760,320. Columbus: Ohio Department of Highways and Public Works. OCLC5673562. Retrieved March 28, 2019.
"Trumbull County Updates". ODOT. 2008. Archived from the original on February 26, 2012. Retrieved April 26, 2019. SR 0169R - Route Reversed, Overlap Removed, J.E. 8/17/2007
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Ohio Department of Highways and Public Works (August 1, 1926). Map of Ohio Showing State Routes(PDF) (Map). 1:760,320. Columbus: Ohio Department of Highways and Public Works. OCLC5673562. Retrieved March 28, 2019.
Ohio Department of Highways and Public Works (June 1, 1927). Map of Ohio Showing State Routes(PDF) (Map). 1:760,320. Columbus: Ohio Department of Highways and Public Works. OCLC5673562. Retrieved March 28, 2019.