Trail Ways of Our Land. unknown place: National Trailways Bus Association, 1972

Trail Ways of Our Land. unknown place: National Trailways Bus Association, 1972, Volume: Gilbert D1083. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527820 Accessed December 27, 2025.