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