Columbia subject headings:
Harvard subject headings:
German language--Grammar, Historical--Congresses.
German language--Middle High German, 1050-1500--Syntax--Congresses.
German language--Old High German, 750-1050--Syntax--Congresses.
German language--Syntax--History--Congresses.
Princeton subject headings:
German language--Grammar, Historical--Congresses.
German language--Middle High German, 1050-1500--Syntax--Congresses.
German language--Old High German, 750-1050--Syntax--Congresses.
German language--Syntax--History--Congresses.