Historical Marker Henry C. DeMille, John Tibbetts with others, Betty's party, Betty Hager, Carole Ita White, Richard Hack, Jim Hager, Box: 4, Folder: 132. Collection of Movie Stills, MS 297. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/237991 Accessed June 15, 2025.