Opera is My Hobby - Vladimir Atlantov (series VII, n. 480); Edward Johnson (series VII, n. 481); George London (series VII, n. 482); Erschov (series VII, n. 483); Swarthout (series VII, n. 484), Box: 12, Folder: 11. Personal Papers of James E. Seaver, PP 534. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/163656 Accessed May 17, 2024.