Columbia subject headings:
Harvard subject headings:
Chrétien, de Troyes, active 12th century--Criticism and interpretation.
Chrétien, de Troyes, active 12th century. Perceval le Gallois.
Grail--Legends
Perceval (Legendary character)--Romances.
Princeton subject headings:
Grail--Legends.
Legends.
Perceval (Legendary character)--Romances.
Romances.