- The Oster collection [microform] : papers of Heinrich Schenker /
- File 68: Analyses of Music by Johann Sebastian Bach /
- Bach, Johann Sebastian, 1685-1750. [Keyboard music. Selections] /
- August Halm, "Über J. S. Bachs Konzertform" Robert Handke, "Der neapolitanische Sextakkord in Bachscher Auffassung". Sonderabdruck aus Bach-Jahrbuch 1919. Inscribed to Schenker and signed by August Halm, July 9, 1920