Columbia subject headings:
Arthurian romances--History and criticism.
Grail--Legends--History and criticism.
Perceval (Legendary character)--Romances--History and criticism.
Symbolism in literature.
Harvard subject headings:
Grail--Legends--History and criticism
Grail--Romances--History and criticism.
Princeton subject headings:
Arthurian romances--History and criticism.
Grail--Legends--History and criticism.
Perceval (Legendary character)--Romances--History and criticism.
Symbolism in literature.