- Felix Salzer papers /
- Series 2: Heinrich Schenker Nachlass /
- Sub-series 4: Analyses of Beethoven, Brahms, Haydn, and Mozart (Mappe 27) /
- Mozart /
- 27/56 /
- Booklet: Sketch, Fantasie in c minor, K. 475, "Hintergrund und Mittelgrund"; in the hand of Angi Elias