Columbia subject headings:
Harvard subject headings:
German language--Dialectology--Congresses.
German language--Dialects--Congresses
German language--Middle High German, 1050-1500--Variation--Congresses.
Low German language--Variation--Congresses.
Princeton subject headings:
German language--Dialectology--Congresses.
German language--Dialects--Congresses.
German language--Middle High German, 1050-1500--Variation--Congresses.
Low German language--Variation--Congresses.