Columbia subject headings:
Plagiarism.
Wolfram, von Eschenbach, active 12th century--Authorship.
Wolfram, von Eschenbach, active 12th century. Willehalm.
Harvard subject headings:
Plagiarism.
Wolfram, von Eschenbach, active 12th century--Authorship.
Wolfram, von Eschenbach, active 12th century. Willehalm.
Princeton subject headings:
Wolfram, von Eschenbach, 12th cent. Willehalm.