Columbia subject headings:
Harvard subject headings:
German literature--Middle High German, 1050-1500--History and criticism
German literature--Old High German, 750-1050--History and criticism
Riddles in literature.
Princeton subject headings:
German literature--Middle High German, 1050-1500--History and criticism.
German literature--Old High German, 750-1050--History and criticism.
Riddles in literature.