1. Missa Solemnis in B Flat Collection: Concert Programs (SOM) Contributers: Haydn, Joseph (composer), William W. Olson (conductor), Winston Stephens, Jr. (organist), Barbara Dyer (soprano), Connie Brown (contralto), Kenneth Hodgson (tenor), David Johnson (bass), and University of Illinois Summer Chorus (chorus) Performance: Performance Performance Date: 1976-07-26 Location: Music and Performing Arts Library, University of Illinois Concert Program: v.25 p.571