1. Classical Gas Collection: Concert Programs (SOM) Contributers: Williams, Mason (composer) and Ken Rothacker (guitar) Performance: Guitar Recital Performance Date: 1980-02-23 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.29 p.58
2. Danza Pomposa Collection: Concert Programs (SOM) Contributers: Tansman, Alexandre (composer) and Ken Rothacker (guitar) Performance: Guitar Recital Performance Date: 1980-02-23 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.29 p.58
3. Scherzino Collection: Concert Programs (SOM) Contributers: Tansman, Alexandre (composer) and Ken Rothacker (guitar) Performance: Guitar Recital Performance Date: 1980-02-23 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.29 p.58
4. Two Etudes Collection: Concert Programs (SOM) Contributers: Jeffers, Robert (composer) and Ken Rothacker (guitar) Performance: Guitar Recital Performance Date: 1980-02-23 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.29 p.58