- Felix Salzer papers /
- Series 2: Heinrich Schenker Nachlass /
- Sub-series 4: Analyses of Beethoven, Brahms, Haydn, and Mozart (Mappe 27) /
- Beethoven /
- 27/4 /
- Recto: Sketch, Piano Sonata in Ab major, op. 26; "299" marked in top right hand corner
No child components.