"The good roads movement in Ohio, 1900-1912" by Lloyd Sponholtz, Missouri Valley History Conference March 12, 1976

"The good roads movement in Ohio, 1900-1912" by Lloyd Sponholtz, Missouri Valley History Conference March 12, 1976, Box: 11, Folder: 2. Personal Papers of Lloyd Sponholtz, PP 521. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/252600 Accessed December 24, 2025.