The The Oster collection: papers of Heinrich Schenker is arranged in eighty-nine series:bequeathed to the New York Public Library by Ernst Oster, represents the major portion of the Nachlass of the Viennese music theorist Heinrich Schenker. It contains published and unpublished analyses and writings on music (particularly the works of Bach, Beethoven, Brahms, and Chopin) as well as writings on non-musical topics, correspondence with students, acquaintances (such as Otto Erich Deutsch, Wilhelm Furtwängler, and Hans Weisse), and his publishers, Universal-Edition (including directors Emil Hertzka and Alfred Kalmus) and Drei Masken Verlag. It also contains published music scores annotated by Schenker, clippings, and miscellaneous materials
