Columbia subject headings:
Da Ponte, Lorenzo, 1749-1838.
Mozart, Wolfgang Amadeus, 1756-1791. Operas.
Opera--Austria--Vienna--18th century.
Harvard subject headings:
Da Ponte, Lorenzo, 1749-1838--Musical settings--History and criticism.
Mozart, Wolfgang Amadeus, 1756-1791. Operas.
Opera--Dramaturgy
Princeton subject headings: