Columbia subject headings:
Harvard subject headings:
German language--Dialects--Austria--Congresses.
German language--Social aspects--Austria--Congresses.
German language--Variation--Austria--Congresses.
German language--Vocabulary--Congresses.
Princeton subject headings:
German language--Austria--Congresses.
German language--Dialects--Congresses.
German language--Social aspects--Congresses.
German language--Variation--Congresses.