1. Sonata in B-flat Major, K. 281 Collection: Concert Programs (SOM) Contributers: Mozart (composer) and Malcolm Bilson (fortepiano) Performance: Performance Performance Date: 1976-02-05 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.25 p.37
2. Sonata in C Minor, Hob. 20 Collection: Concert Programs (SOM) Contributers: Haydn (composer) and Malcolm Bilson (fortepiano) Performance: Performance Performance Date: 1976-02-05 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.25 p.37