Fidelio - Beethoven, Ludwig : van <1770-1827>. (OLS)http://semarc/name/47425; Treitschke, Georg Friedrich. (OLS)http://semarc/name/16783; Sonnleithner, Joseph Ferdinand. (OLS)http://semarc/name/74611 (Stagione d'opera e balletto 1999-2000, 1999)
Keywords: Opera in musica. (OLS)http://semarc/subject/8916; Beethoven, Ludwig : van <1770-1827> - Opere. (OLS)http://semarc/subject/16171; Melodramma - Soggetti. (OLS)http://semarc/subject/8918