Columbia subject headings:
Grail--Legends--History and criticism.
Perceval (Legendary character)
Harvard subject headings:
Grail--Legends--History and criticism
Perceval (Legendary character)
Perceval (Legendary character)--Romances--History and criticism.
Princeton subject headings:
Grail--Legends--History and criticism.
Muschg, Adolf, 1934- Rote Ritter.
Perceval (Legendary character).