1. Sonatina (1950) Collection: Concert Programs (SOM) Contributers: Alvin Etler (composer) and Guillermo Perich (viola) Performance: Faculty Viola Recital Performance Date: 1976-03-23 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.25 p.197
2. Two Rhapsodies (1905) Collection: Concert Programs (SOM) Contributers: Alvin Etler (composer), Guillermo Perich (viola), Wilma Zonn (oboe), and Dean Sanders (piano) Performance: Faculty Viola Recital Performance Date: 1976-03-23 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.25 p.197