Columbia subject headings:
Music theory--History--To 500--Congresses.
Music, Greek and Roman--History and criticism--Congresses.
Music--Social aspects--Greece--History.
Music--Social aspects--Rome--History.
Harvard subject headings:
Music, Greek and Roman--Congresses.
Music, Greek and Roman--History and criticism--Congresses.
Princeton subject headings:
Music theory--History--To 500--Congresses.
Music, Greek and Roman--History and criticism--Congresses.
Music--Social aspects--Greece--History.
Music--Social aspects--Rome--History.