found: Strauss, R. Feuersnot [SR] p1980:labels (Marcel Cordes) container (sings role of Kunrad)
found: Kutsch/Riemens. Grosses Sängerlexikon, 1987-(Cordes, Marcel; b. Mar. 11, 1920, Stelzenberg (Rheinpfalz); baritone) Ergänzungsband, 1994 (d. Nov. 26, 1992, Angerberg (Tirol))
found: Cordes, M. Marcel Cordes [SR] p2009:label (Marcel Cordes) insert (b. Kurt Schumacher, Feb. 13, 1920, Stelzenberg; originally a tenor; changed name to Marcel Cordes in 1951 when he began his career as a baritone; d. Nov. 6, 1992, Angerberg, Tirol)