2011-03-292023-10-072011-03-292023-10-071977-01-271977-01-27Betty Ruth Tomfohrde, piano and Frances Bible, mezzo-soprano (performer). "Er ist's." (1977) Shepherd School of Music, Rice University: <a href="https://hdl.handle.net/1911/60496">https://hdl.handle.net/1911/60496</a>.https://hdl.handle.net/1911/60496Copyrighted material. All rights reserved.Songs (Medium voice) with pianosound recording-musical