Columbia subject headings:
Harvard subject headings:
Arthur, King--Congresses.
Arthurian romances--History and criticism--Congresses.
German literature--Middle High German, 1050-1500--History and criticism--Congresses
Literature, Medieval--History and criticism--Congresses
Wirnt, von Grafenberg, active 13th century. Wigalois.
Princeton subject headings:
Arthur, King
Arthurian romances--History and criticism.