Title: Der Opernball : Operette in 3 Akten /
Authors: Heuberger, Richard, 1850-1914; Léon, Victor, 1858-1940; Delacour, 1815-1883.; Waldberg, Heinrich, 1861-; John Milton and Ruth Neils Ward Collection (Harvard Theatre Collection)
Publisher: Bosworth & Co.,
Year: 1898
Subjects: Operas Librettos.