USSR Leningrad; Poland; Krakow/Auschwitz; Bulgaria; Spain, 1957; Spain, 1974; Portugal, Box: 6, Carton: 10. Personal papers of John Laurence Day, PP 551. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/174813 Accessed May 17, 2024.