Christensen, Jean and Jesper. From Arnold Schoenberg's Literary Legacy: A Catalog of Neglected Items. Warren: Harmonie Park Press, 1988, 164 p.
Includes previously uncataloged manuscripts from the Arnold Schoenberg Institute archives.
The Berg-Schoenberg Correspondence: Selected Letters, edited by Juliane Brand, Christopher Hailey, and Donald Harris. New York: W. W. Norton, 1987, 497 p.
Documents Schoenberg's relationship with the composer Alban Berg.
Ennulat, Egbert M. Arnold Schoenberg Correspondence: A Collection of Translated and Annotated Letters...
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