Columbia subject headings:
Harvard subject headings:
Arthur, King--Congresses.
Arthur, King--Legends--Congresses.
Arthurian romances--Appreciation--Italy--Congresses.
Grail--Legends--History and criticism--Congresses.
Princeton subject headings:
Arthur, King--Congresses.
Arthur, King--Legends--Congresses.
Arthurian romances--Appreciation--Italy--Congresses.
Grail--Legends--History and criticism--Congresses.