1. Out of Doors Collection: Concert Programs (SOM) Contributers: Bartok (composer) and William Heiles (pianist) Performance: Faculty Piano Recital Performance Date: 1975-10-26 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.24 p.547
2. Sonata Collection: Concert Programs (SOM) Contributers: Bartok (composer) and William Heiles (pianist) Performance: Faculty Piano Recital Performance Date: 1975-10-26 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.24 p.548
3. Third Sonata Format II: trope Collection: Concert Programs (SOM) Contributers: Boulez (composer) and William Heiles (pianist) Performance: Faculty Piano Recital Performance Date: 1975-10-26 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.24 p.547
4. Third Sonata formant III/2: constellation-miroir Collection: Concert Programs (SOM) Contributers: Boulez (composer) and William Heiles (pianist) Performance: Faculty Piano Recital Performance Date: 1975-10-26 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.24 p.548
5. Three Etudes (Book I) Collection: Concert Programs (SOM) Contributers: Debussy (composer) and William Heiles (pianist) Performance: Faculty Piano Recital Performance Date: 1975-10-26 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.24 p.547
6. Three Etudes (Book II) Collection: Concert Programs (SOM) Contributers: Debussy (composer) and William Heiles (pianist) Performance: Faculty Piano Recital Performance Date: 1975-10-26 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.24 p.548