Opera is My Hobby - Igor Gorin (series VII, n. 442); Lieders of Robert Schumann (series VII, n. 443); Operatic Families (series VII, n. 444); Baritone-Tenor Duets (series VII, n. 446), Box: 12, Folder: 2. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163647 Accessed May 17, 2024.