1. Prelude No. 18, Op. 28 Collection: Concert Programs (SOM) Contributers: Chopin,Frederic (composer) and Ross Westphal (piano) Performance: Performance Performance Date: 1945-12-20 Location: Music and Performing Arts Library, University of Illinois Concert Program: vol. 2, p. 139
2. Prelude No. 3, Op. 28 Collection: Concert Programs (SOM) Contributers: Chopin,Frederic (composer) and Ross Westphal (piano) Performance: Performance Performance Date: 1945-12-20 Location: Music and Performing Arts Library, University of Illinois Concert Program: vol. 2, p. 139