1. Old American Songs Collection: Concert Programs (SOM) Contributers: Copland, Aaron (arranger), William Warfield (bass-baritone), and Robert Ray (pianist) Performance: Faculty Voice Recital Performance Date: 1977-02-01 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.26 p.51
2. Spirituals Collection: Concert Programs (SOM) Contributers: Johnson, Hall (arranger), William Warfield (bass-baritone), and Robert Ray (pianist) Performance: Faculty Voice Recital Performance Date: 1977-02-01 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.26 p.51