2011-03-292024-06-222011-03-292024-06-221979-03-091979-03-09Sumiyo Ender, soprano and Brenda Landrum, piano (performer). "Er ist's." (1979) Shepherd School of Music, Rice University: <a href="https://hdl.handle.net/1911/60482">https://hdl.handle.net/1911/60482</a>.https://hdl.handle.net/1911/60482Copyrighted material. All rights reserved.Songs (High voice) with pianosound recording-musical