2011-03-292023-10-072011-03-292023-10-071981-10-251981-10-25Mary Norris, piano and Frances Bible, mezzo-soprano (performer). "Er ist's." (1981) Shepherd School of Music, Rice University: <a href="https://hdl.handle.net/1911/59902">https://hdl.handle.net/1911/59902</a>.https://hdl.handle.net/1911/59902Copyrighted material. All rights reserved.Songs (Medium voice) with pianosound recording-musical