The Washington D.C. International horse race, programs for the 5th, 7th-10th, 12th-16th races, 1956 - 1967, Box: 5, Folder: 7. John and Frances Peterson collection, RH MS 1330. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/195244 Accessed May 17, 2024.