Hoffman, Al, "Auf Wiedersehen My Dear" and "Speak to Me of Love" [for piano, voice, organ, and accordion; printed and handwritten], Box: 2, Folder: A: 97. Louis and Henry Manners Katzman collection, MS 156. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/416067 Accessed May 19, 2024.