Columbia subject headings:
German language--Standardization--Congresses.
German language--Study and teaching--Congresses.
German language--Variation--Congresses.
Sociolinguistics--Congresses.
Harvard subject headings:
German language--Standardization--Congresses.
German language--Study and teaching--Congresses.
German language--Variation--Congresses.
Sociolinguistics--Congresses.
Princeton subject headings:
German language--Standardization--Congresses.
German language--Study and teaching--Congresses.
German language--Variation--Congresses.
Sociolinguistics--Congresses.