Columbia subject headings:
Harvard subject headings:
Wolfram, von Eschenbach, active 12th century--Bibliography.
Wolfram, von Eschenbach, active 12th century--Criticism and interpretation.
Wolfram, von Eschenbach, active 12th century. Titurel.
Princeton subject headings:
Wolfram, von Eschenbach, active 12th century--Criticism and interpretation.