Columbia subject headings:
Sacred music--Italy--19th century--History and criticism--Congresses.
Verdi, Giuseppe, 1813-1901--Congresses.
Harvard subject headings:
Sacred music--Italy--19th century--History and criticism--Congresses.
Verdi, Giuseppe, 1813-1901--Congresses.
Princeton subject headings:
Sacred music--Italy--19th century--History and criticism--Congresses.
Verdi, Giuseppe, 1813-1901--Congresses.