- Felix Salzer papers /
- Series 2: Heinrich Schenker Nachlass /
- Sub-series 1: Study of thoroughbass, analyses of J.S. Bach, miscellaneous notes (Mappe 6) /
- Notes on J.S. Bach's Generalbassbüchlein (and other notes on Generalbass) /
- 6/110 /
- Recto: Notes on an unidentified topic or work, with page numbers; "K" and "Kp" [i.e., Kontrapunkt] written in blue pencil in top right hand corner