Opera is My Hobby - Scenes Usually Omitted (series VII, n. 145); The Lyrico-Spinto Voice Tenor (series VII, n. 147); the Supernatural in Opera (series VII, n. 148); Sills and Sutherland (series VII, n. 149), Box: 11, Folder: 9. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163580 Accessed May 16, 2024.