1. 33 Variations on a Waltz of Diabelli, Op. 120 Collection: Concert Programs (SOM) Contributers: Beethoven, Ludwig van (composer) and William Heiles (piano) Performance: Performance Performance Date: 1969-01-07 Location: Music and Performing Arts Library, University of Illinois Concert Program: vol. 17, p. 71
2. Sonata No. 1 (1948) Collection: Concert Programs (SOM) Contributers: Boulez, Pierre (composer) and William Heiles (piano) Performance: Performance Performance Date: 1969-01-07 Location: Music and Performing Arts Library, University of Illinois Concert Program: vol. 17, p. 71
3. Three Etudes Collection: Concert Programs (SOM) Contributers: Debussy, Claude (composer) and William Heiles (piano) Performance: Performance Performance Date: 1969-01-07 Location: Music and Performing Arts Library, University of Illinois Concert Program: vol. 17, p. 71