Columbia subject headings:
Harvard subject headings:
Albrecht, von Scharfenberg, active 13th century. Jüngere Titurel.
Wolfram, von Eschenbach, active 12th century. Titurel.
Princeton subject headings:
Albrecht, von Scharfenberg, active 13th century. Jüngere Titurel.
Wolfram, von Eschenbach, active 12th century. Titurel.