"Wagner, Richard." . . "Operas Librettos." . . "Operas Librettos" . "Fisher, Burton D." . . "Operas Guías escénicas." . . . . . . . . . "Stories, plots, etc"@en . . . "Electronic resource"@en . . . . . . . "Electronic books"@en . . . "Wagner's THE RING OF THE NIBELUNG"@en . . "Wagner's The ring of the Nibelung (\"Der Ring des Nibelungen\")"@en . . "Ring of the Nibelung"@en . "Ring of the Nibelung" . . "A comprehensive guide to Wagner's THE RING OF THE NIBELUNG, featuring insightful and in depth Commentary and Analysis, and Story Narrative with over 90 Music Highlight Examples of THE RHEINGOLD, THE VALKYRIE, SIEGFRIED, and TWILIGHT OF THE GODS."@en . "Ring des Nibelungen"@en . . "Wagner's The ring of the Nibelung"@en . "Wagner's The ring of the Nibelung" . . . . "Livres électroniques" . . "Wagner's The Ring of the Nibelung (Der Ring des Nibelungen) Opera Classics Library Series"@en . . . . . . "Wagner[alpha]s : The ring of the Nibelung" . . "A comprehensive guide featuring Principal Characters in the opera, Brief Story Synopsis, Story Narrative with Music Highlight Examples, an in depth Commentary and Analysis, and a Dictionary of Opera and Musical Terms."@en . . . . "Opera alemana." . . . . "MUSIC Genres & Styles Opera." . . "Opera alemana Libretos." . . "Operas." . .