Columbia subject headings:
Church history--Middle Ages, 600-1500--Congresses.
Church music--500-1400--Congresses.
Civilization, Medieval--Congresses.
Harvard subject headings:
Cantors (Church music)--Catholic Church--History--To 1500--Congresses.
Church history--Middle Ages, 600-1500--Congresses.
Church music--500-1400--Congresses.
Civilization, Medieval--Congresses
Conference papers and proceedings.
Princeton subject headings:
Cantors (Church music)--Europe--History.
Church history--Middle Ages, 600-1500--Congresses.
Church music--500-1400--Congresses.
Civilization, Medieval--Congresses.