Il trovatore: Act IV: The Ordeal: Scene 2: Madre, non dormi - Song by Giuseppe Verdi, Fedora Barbieri, Jussi Björling, George Cehanovsky, Paul Franke, Zinka Milanov, Nicola Moscona, Margaret Roggero, Nathaniel Sprinzena, Leonard Warren, Robert Shaw Chorale, RCA Victor Orchestra, Renato Cellini