. . "Orchestre, Musique d'." . . "Wiener Philharmoniker." . . "An introduction to Der Ring des Nibelungen. with extracts from the complete recording"@en . . "An introduction to der ring des Nibelungen"@en . "An introduction to Der Ring des Nibelungen being an explanation and analysis of Wagner's system of leitmotifs by Deryck Cooke with 193 music examples either extracted from the complete recording or specially recorded for this production" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "enregistrement parlé" . . . . . . . . . . . . . . "An introduction to \"Der Ring des Nibelungen\"" . "An introduction to Der Ring des Nibelungen with extracts from the complete recording" . . . . . . . . . "An introduction to Der Ring des Nibelungen" . "musique dramatique vocale (musique classique)" . . . "An introduction to Der Ring des Nibelungen"@en . . "Ring des Nibelungen" . "Ring des Nibelungen"@en . "documentaire" . . . . "Stories, plots, etc" . "An introduction to Der Ring des Nibelungen : with extracts from the complete recording"@en . . "An introduction to Der Ring des Nibelungen : being an explanation and analysis of Wagner's system of leitmotifs : with 193 music examples either extracted from the complete recording of specially recorded for this production" . . . . . . . "An introduction to Der Ring des Nibelungen with extracts from complete recording"@en . "Operas Excerpts." . . "Leitmotiv." . . "CD." . . "Wiener Sängerknaben." . . "Orchestral music." . . "Einführung." . . "Chorus, Secular (Women's voices) with instrumental ensemble." . . "Opéras Extraits." . . "Ring des Nibelungen (Wagner, Richard)" . .