Opera is My Hobby - The Changing Baritone Tradition (series VII, n. 491); Great French Singers Interpret Wagner (series VII, n. 492); Maria Barrientos (series VII, n. 493); Gotthelf Pistor (series VII, n. 494), Box: 12, Folder: 13. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163658 Accessed May 17, 2024.