Columbia subject headings:
Dutch language--To 1500.
German language--Old High German, 750-1050.
Old Saxon language.
Tiefenbach, Heinrich--Bibliography.
Harvard subject headings:
Dutch language--To 1500.
German language--Old High German, 750-1050.
Old Saxon language.
Tiefenbach, Heinrich.
Princeton subject headings:
Dutch language--To 1500.
German language--Old High German, 750-1050.
Old Saxon language.