Columbia subject headings:
Grail--Legends.
Perceval (Legendary character)--Romances.
Harvard subject headings:
Chrétien, de Troyes, active 12th century. Perceval le Gallois--Adaptations.
Chrétien, de Troyes, active 12th century. Perceval le Gallois--Criticism, Textual.
Epic literature, French--History and criticism.
French literature--To 1500--History and criticism
Grail--Legends
Perceval (Legendary character)--Romances.
Princeton subject headings:
Grail--Legends.
Perceval (Legendary character)--Romances.