http://www.scena.org/lsm/sm5-3/ChristaLudwig-en.htm Christa Ludwig: Looking Back Interview by Philip Anson. 1999.11.01 http://www.gregsandow.com/ludwig.htm Demanding Teacher Wall Street Journal story by Greg Sandow about Christa Ludwig teaching master classes at Carnegie Hall. 2000.12.12 http://www.cantabile-subito.de/Mezzo-Sopranos/Ludwig__Christa/hauptteil_ludwig__christa.html Ludwig, Christa German mezzo-soprano. Brief biography, photos, discography and music clip.