Columbia subject headings:
Harvard subject headings:
Language and education--Europe--Congresses.
Language and languages--Study and teaching--Europe--Congresses
Languages in contact--Europe--Congresses.
Multilingual education--Europe--Congresses.
Princeton subject headings:
Language and education--Europe--Congresses.
Language and languages--Study and teaching--Europe--Congresses.
Languages in contact--Europe--Congresses.
Multilingual education--Europe--Congresses.