Columbia subject headings:
Harvard subject headings:
Composers--Italy--Biography--Congresses.
Duni, Egidio, 1708-1775--Congresses.
Opera--France--18th century--Congresses.
Opera--Italy--18th century--Congresses.
Princeton subject headings:
Composers--Italy--Biography--Congresses.
Duni, Egidio, 1708-1775--Congresses.
Opera--France--18th century--Congresses.
Opera--Italy--18th century--Congresses.