Columbia subject headings:
Verdi, Giuseppe, 1813-1901--Appreciation--Italy--History--20th century--Congresses.
Harvard subject headings:
Music publishing--Italy--History--20th century--Congresses.
Verdi, Giuseppe, 1813-1901--Appreciation--Italy--History--20th century--Congresses.
Princeton subject headings:
Verdi, Giuseppe, 1813-1901--Appreciation--Italy--History--20th century--Congresses.