Opera is My Hobby - Caesare Formichi (series VII, n. 632); The Movies Go To the Opera (series VII, n. 633); Singers Who Sang Together (series VII, n. 634), Box: 12, Folder: 47. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163692 Accessed June 15, 2025.