Columbia subject headings:
Harvard subject headings:
Language and languages--Variation
Manchester (England)--Languages.
Sociolinguistics--Austria--Vienna.
Sociolinguistics--England--Manchester.
Vienna (Austria)--Languages.
Princeton subject headings:
Language and languages--Variation.
Manchester (England)--Languages.
Sociolinguistics--Austria--Vienna.
Sociolinguistics--England--Manchester.
Vienna (Austria)--Languages.