Opera is My Hobby - Supervia (series VII, n. 47); Gigli (series VII, n. 48); Meyerbeer (series VII, n. 49); Rethberg (series VII, n. 50), Box: 10, Folder: 39. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163555 Accessed June 01, 2024.