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- Rapp, Patricia Ann. 1949. "Contemporary American Piano Music". MA thesis. Madison: University of Wisconsin–Madison. (en)
- Johnson, Lawrence. 2005. "Copland Piano Fantasy; Piano Sonata; Piano Variations: Fiery Performances in a Bargain Set of Three Notable Copland Works". Gramophone . (en)
- Anon. 1984. "Gerald Sykes, 80, Dies; Was Author and Critic". The New York Times . (en)
- Copland, Aaron. A Reader: Selected Writings 1923–1972, new edition. Edited, with an introduction, by Richard Kostelanetz. Asst. editor Steve Silverstein. New York: Routledge, 2004. . (en)
- Oja, Carol J. 2000. Making Music Modern: New York in the 1920s. Oxford and New York: Oxford University Press. . (en)
- Soares, Janet Mansfield. 1992. Louis Horst: Musician in a Dancer's World. Durham: Duke University Press. . (en)
- Perlis, Vivian. 2002. "Aaron Copland and John Kirkpatrick: 'Dear John, Can You Help Me Out?'". In Copland Connotations: Studies and Interviews, edited by Peter Dickinson, foreword by H. Wiley Hitchcock, 57–65. Woodbridge, Suffolk, and Rochester, New York: The Boydell Press. . (en)
- Pollack, Howard. Aaron Copland: The Life and Work of an Uncommon Man. New York: Henry Holt and Company, 1999. ; Urbana: University of Illinois Press. . (en)
- Butterworth, Neil. The Music of Aaron Copland. London: Toccata Press; New York: Universe Books, 1985. . (en)
- Greenfield, Edward, Ivan March, Robert Layton. 1996. The Penguin Guide to Compact Discs Yearbook, 1995/6. Penguin Handbooks. London and New York: Penguin Books. (en)
- Sales, Grover, and Michael Steinberg. 2001. "Finding an American Sound: Two Contemporaries: Duke Ellington, Aaron Copland". In American Mavericks: Musical Visionaries, Pioneers, Iconoclasts, edited by Susan Key and Larry Rothe 36–49. San Francisco: San Francisco Symphony; Berkeley and Los Angeles: University of California Press. ; . (en)
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