Columbia subject headings:
Church music--Catholic Church--Congresses.
Church music--Europe--Congresses.
Church music--Italy--Congresses.
Music in monasteries--Italy--Congresses.
Harvard subject headings:
Church music--Catholic Church--Congresses.
Church music--Europe--Congresses.
Church music--Italy--Congresses.
Music in monasteries--Italy--Congresses.
Princeton subject headings:
Church music--Catholic Church--Congresses.
Church music--Europe--Congresses.
Church music--Italy--Congresses.
Music in monasteries--Italy--Congresses.