Wagner, Richard, 1813-1883. Operas — Audiobooks
Richard Wagner and His Poetical Work, from "Rienzi" to "Parsifal"
by Judith Gautier
Richard Wagner, Composer of Operas
by John F. Runciman
Richard Wagner His Life and His Dramas A Biographical Study of the Man and an Explanation of His Work
by W. J. (William James) Henderson
Richard Wagner
by Bruno Nurmi
Wagner and His Music-Dramas
by Robert C. Bagar
Studies in the Wagnerian Drama
by Henry Edward Krehbiel