Opera is My Hobby - In Memoriam: Luciano Pavarotti; In Memoriam: baritone Frank Guarrera, 2007; the Life and Art of bass Herbert Witherspoon, Box: 13, Folder: 22. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163742 Accessed May 17, 2024.