Columbia subject headings:
Music and literature--Europe--History--Congresses.
Music--Europe--History and criticism--Congresses.
Sonnets, European--History and criticism--Congresses.
Sonnets, Italian--History and criticism--Congresses.
Vocal music--Congresses.
Harvard subject headings:
Music and literature--Europe--History--Congresses.
Music--Europe--History and criticism--Congresses.
Sonnets, European--History and criticism--Congresses.
Sonnets, Italian--History and criticism--Congresses.
Princeton subject headings:
Music and literature--Europe--History--Congresses.
Music--Europe--History and criticism--Congresses.
Sonnets, European--History and criticism--Congresses.
Sonnets, Italian--History and criticism--Congresses.