Columbia subject headings:
Harvard subject headings:
Europe--Languages--Congresses.
Language policy--Europe--Congresses.
Language policy--European Union countries--Congresses.
Linguistic minorities--Europe--Congresses.
Sociolinguistics--Europe--Congresses.
Princeton subject headings:
Europe--Languages--Congresses.
Language policy--Europe--Congresses.
Linguistic minorities--Europe--Congresses.
Sociolinguistics--Europe--Congresses.