CR or CONTRAIL (Consolidated Rail Corp) diesels 6420 - 45213 – C&TS (Cumbres & Toltec Scenic) steams, Box: 7, Box: 26. Howard Killam Collection, RH MS 1381. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/226762 Accessed May 19, 2024.