Columbia subject headings:
Mozart, Wolfgang Amadeus, 1756-1791--Congresses.
Music--20th century--History and criticism--Congresses.
Harvard subject headings:
Mozart, Wolfgang Amadeus, 1756-1791--Influence--Congresses.
Music--20th century--Congresses
Princeton subject headings:
Mozart, Wolfgang Amadeus, 1756-1791--Influence--Congresses.
Music--20th century--History and criticism--Congresses.