Columbia subject headings:
Harvard subject headings:
Assimilation (Sociology)--Congresses
Language and languages--Political aspects--Congresses
Languages in contact--Congresses
Nationalism--Congresses
Sociolinguistics--Congresses
Princeton subject headings:
Assimilation (Sociology)--Congresses.
Language and languages--Political aspects--Congresses.
Languages in contact--Congresses.
Nationalism--Congresses.
Sociolinguistics--Congresses.