The forging of the 'Ring' Richard Wagner's composition sketches for 'Der Ring des Nibelungen' /
Westernhagen, Curt von.
Whittall, Arnold.
Whittall, Mary.
Cambridge Cambridge University Press
1976
Translation of: 'Die Entstehung des "Ring"'. Zürich : Atlantis, 1973
Bibliography: p.244-246. - Includes index
Wagner, Richard, 1813-1883.