Piano Portraits: Conversations with Great Pianists. Foreword by Emanuel Ax. [17 audio CDs + 1 CD-ROM], 2006, Box: 4, item: 3. John C. Tibbetts papers, MS 325. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/227362 Accessed May 03, 2024.