Columbia subject headings:
Harvard subject headings:
German language--Adjective--History.
German language--Old High German, 750-1050--Adjective.
German language--Old High German, 750-1050--Suffixes and prefixes.
German language--Suffixes and prefixes--History.
Princeton subject headings:
German language--Adjective--History.
German language--Suffixes and prefixes--History.