- The Oster collection [microform] : papers of Heinrich Schenker /
- File 38: Draft Material for Der Freie Satz and Early Articles /
- Part 1 /
- Verso: Fragment from the article "Joh. S. Bach: Sechs Sonaten für Violine. Partita III (E-Dur) Präludio" in Jeanette Schenker's hand with emendations by Schenker (page 82 of the version published in Das Meisterwerk in der Musik, vol. 1)