Columbia subject headings:
Mozart, Wolfgang Amadeus, 1756-1791. Lucio Silla--Congresses.
Opera--18th century--Congresses.
Harvard subject headings:
Mozart, Wolfgang Amadeus, 1756-1791. Lucio Silla--Congresses.
Opera--18th century--Congresses.
Princeton subject headings:
Mozart, Wolfgang Amadeus, 1756-1791. Lucio Silla--Congresses.