Ritual and ceremony information (both Theta specific and general Boulé), 1937, 1964, 1971, 1978, undated, Box: 2, Folder: 12. 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/61122 Accessed February 17, 2025.