Columbia subject headings:
German language--Austria.
German language--Dialects.
German language--Foreign countries.
German language--Germany (East)
German language--Germany (West)
German language--Liechtenstein.
German language--Luxembourg.
German language--Social aspects.
German language--Switzerland.
Sociolinguistics.
Harvard subject headings:
German language--Dialects.
German language--Europe, German-speaking.
German language--Social aspects.
Sociolinguistics.
Princeton subject headings:
German language--Austria.
German language--Dialects.
German language--Foreign countries.
German language--Germany (East)
German language--Germany (West).
German language--Liechtenstein.
German language--Luxemburg.
German language--Social aspects.
German language--Switzerland.
Sociolinguistics.