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References
Ludwig Frankenstein
(ed) (1912). Richard Wagner-Jahrbuch IV. Berlin: Schnippel.
(ed) (1907). Richard Wagner-Jahrbuch I. Berlin: Paetel.
(ed) (1912). Richard Wagner-Jahrbuch IV. Berlin: Schnippel.
(ed) (1907). Richard Wagner-Jahrbuch I. Berlin: Paetel.