Columbia subject headings:
Arthurian romances--History and criticism.
Grail--Legends--History and criticism.
Romances--History and criticism.
Harvard subject headings:
Arthurian romances--History and criticism.
Cycles (Literature)
French poetry--To 1500--History and criticism
Grail--Legends--History and criticism
Romances--History and criticism.
Princeton subject headings:
Arthurian romances--History and criticism.
Grail--Legends--History and criticism.
Romances--History and criticism.