Opera is My Hobby - Monteverdi's Orfeo (series VI, n. 41); French Baritone (series VI, n. 42); Tannhauser (series VI, n. 44); Martinelli (series VI, n. 47); Traubel (series VI, n. 49), Box: 10, Folder: 12. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163528 Accessed May 16, 2024.