Columbia subject headings:
Harvard subject headings:
German language--Dialectology--Congresses.
Language and culture--Germany--Congresses.
Regionalism--Germany--Congresses.
Princeton subject headings:
Europe, German-speaking--Social life and customs--Congresses.
German language--Dialectology--Congresses.
German language--Dialects--Social aspects--Congresses.
Linguistic geography--Congresses.