51. Carillon Collection: Concert Programs (SOM) Contributers: Gibson, Gary (composer) and Michael Pfeifer (percussion) Performance: Senior Recital Performance Date: 1988-04-29 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.37 p.421
52. Tension-relax fur schlagzeug Collection: Concert Programs (SOM) Contributers: Guinjoan, Joan (composer) and Michael Pfeifer (percussion) Performance: Senior Recital Performance Date: 1988-04-29 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.37 p.421