Columbia subject headings:
Harvard subject headings:
Arthurian romances--History and criticism.
Grail--Romances--History and criticism.
Wolfram, von Eschenbach, active 12th century--Criticism and interpretation.
Princeton subject headings:
Wolfram, von Eschenbach, 12th cent. Parzival.
Wolfram, von Eschenbach, active 12th century.