Columbia subject headings:
Harvard subject headings:
German language--Dialects--Europe, German-speaking--History--Congresses.
German language--Early modern, 1500-1700--Congresses.
German language--Middle High German, 1050-1500--Congresses.
Princeton subject headings:
Bureaucracy--Germany--Language--Congresses.
German language--Early modern, 1500-1700--Congresses.
Language policy--Europe, German-speaking--Congresses.