Columbia subject headings:
Kudrun.
Nibelungenlied.
Harvard subject headings:
Civilization, Medieval, in literature.
Epic poetry, German--History and criticism.
German poetry--Middle High German, 1050-1500--History and criticism
Kudrun.
Nibelungen in literature.
Nibelungenlied.
Princeton subject headings:
Kudrun.
Nibelungenlied.