The opera libretto library : the authentic texts of the German, French, and Italian operas with music of the principal airs, with the complete English and German, French, or Italian parallel texts. - Wagner, Richard; Wagner, Richard; Wagner, Richard; Wagner, Richard; Wagner, Richard; Wagner, Richard; Wagner, Richard; Bizet, Georges; Gounod, Charles; Gounod, Charles; Massenet, Jules; Offenbach, Jacques; et al.