- Felix Salzer papers /
- Series 2: Heinrich Schenker Nachlass /
- Sub-series 6: Analyses of Bach, Beethoven, Brahms, Schubert (Mappe 29) /
- Bach /
- 29/11 /
- Recto: Sketches and notes, Invention in Eb major, BWV 776, dated Oct. 27, 1930; "Weisse" written in upper left hand corner