"Wörterbuch." . . "Operor uppslagsverk." . . "Oper." . . "Operor Uppslagsbok." . . "Geschichte." . . . . . . . "The new Grove dictionary of opera Vol. 1. A - D" . "The new Grove dictionary of opera. 1, A - D" . . . "The new Grove dictionary of opera Vol. 1 A - D" . "The new Grove dictionary of opera/ 1, A - D" . . . . . "The new Grove dictionary of opera. Vol. 1, A-D" . "The New Grove dictionary of opera. Volume One, A-D"@en . . "The new Grove dictionary of opera 1. A - D" . . . "The new Grove dictionary of opera. 1, A-D" . "The new Grove dictionary of opera / 1 A - D" . . "The New Grove dictionary of opera"@en . . . . . "Dictionaries"@en . . . . . . .