Columbia subject headings:
Grail.
Sex in literature.
Wolfram, von Eschenbach, active 12th century--Criticism and interpretation.
Harvard subject headings:
Love in literature
Sex in literature
Sex role in literature
Wolfram, von Eschenbach, active 12th century. Parzival.
Princeton subject headings:
Love in literature.
Sex in literature.
Sex role in literature.
Wolfram, von Eschenbach, 12th cent. Parzival.