Membership info. -- Archon listings, 1957-1959, 1973, 1975, 1977-1980, 1983-1984, 1986, undated, Box: 2, Folder: 7. Theta Boulé, Sigma Pi Phi papers, RH MS 425. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/61117 Accessed May 18, 2024.