- A Musical Guide to the Richard Wagner Ring of the Nibelung by Ernest Hutcheson,  1940
 - Richard Wagner: Poète Et Penseur (French Edition) by Henri Lichtenberger,  2010-04-04
 - A Musical Guide to the Richard Wagner Ring of the Nibelung by Ernest Hutcheson,  1940
 - Richard Wagner: The Stage Designs and Productions from the Premieres to the Present by Oswald Georg Bauer,  1983-11-01
 - The Complete Operas Of Richard Wagner (The Complete Opera Series) by Charles Osborne,  1993-03-22
 - For freedom destined: Mysteries of man's evolution in the mythology of Wagner's Ring operas and Parsifal by Franz Emil Winkler,  1974
 - The Life of Richard Wagner (v. 4) by Ernest Newman,  1976-11-06
 - Richard Wagner and German Opera (Masters of Music) by Donna Getzinger, Daniel Felsenfeld,  2004-11-15
 - Richard Wagner by Frank B. Josserand,  1982-11
 - A Guide To The Ring Of The Nibelung, The Trilogy Of Richard Wagner: Its Origin, Story, And Music (1905) by Richard Aldrich,  2009-01-19
 - Richard and Adolf: Did Richard Wagner Incite Adolf Hitler to Commit the Holocaust? by Christopher Nicholson,  2007-02-28
 - New Studies in Richard Wagner's the Ring of the Nibelung (Studies in the History and Interpretation of Music) 
 - A Guide To The Ring Of The Nibelung, The Trilogy Of Richard Wagner: Its Origin, Story, And Music (1905) by Richard Aldrich,  2009-01-19
 - Richard and Adolf: Did Richard Wagner Incite Adolf Hitler to Commit the Holocaust? by Christopher Nicholson,  2007-02-28
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