Echo: Metamorphoses On A Theme of John Barth, Spiral bound, "For Orchestra", id20331, Box: 23, Folder: 8, Item: 3. Library of the Institute for the Study of Women in Music Collection, SC-SWM. Special Collections & Archives. https://findingaids.csun.edu/repositories/2/archival_objects/97354 Accessed June 16, 2026.