Columbia subject headings:
German literature--Middle High German, 1050-1500--History and criticism.
German literature--Old High German, 750-1050--History and criticism.
Harvard subject headings:
German literature--Middle High German, 1050-1500--History and criticism
German literature--Old High German, 750-1050--History and criticism
Princeton subject headings:
German literature--Middle High German, 1050-1500--History and criticism.
Rupp, Heinz, 1919-1994.