Columbia subject headings:
Arthurian romances--Adaptations.
Grail--Drama.
Knights and knighthood--Drama.
Harvard subject headings:
Arthurian romances--Adaptations.
Grail--Drama.
Knights and knighthood--Drama.
Princeton subject headings:
Adaptations.
Arthurian romances--Adaptations.
Drama.
Grail--Drama.
Knights and knighthood--Drama.