1. Six Preludes Collection: Concert Programs (SOM) Contributers: Ponce, Manuel (composer) and Gary Petersen (guitar) Performance: Junior Recital Performance Date: 1978-12-07 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.27 p.964
2. Sonate, Opus 15, C Major Collection: Concert Programs (SOM) Contributers: Sor, Fernando (composer) and Gary Petersen (guitar) Performance: Junior Recital Performance Date: 1978-12-07 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.27 p.964