1. 15 Variations with Fugue, Op. 35 ("Eroica") Collection: Concert Programs (SOM) Contributers: Beethoven Ludwig van (composer) and William Heiles (pianist) Performance: Faculty Piano Recital Performance Date: 1974-01-20 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.23 p.6
2. Rondena (Iberia, Vol. II) Collection: Concert Programs (SOM) Contributers: Albeniz (composer) and William Heiles (pianist) Performance: Faculty Piano Recital Performance Date: 1974-01-20 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.23 p.6
3. Triana (Iberia, Vol. II) Collection: Concert Programs (SOM) Contributers: Albeniz (composer) and William Heiles (pianist) Performance: Faculty Piano Recital Performance Date: 1974-01-20 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.23 p.6