Columbia subject headings:
Bilingualism--Congresses.
Education, Bilingual--Congresses.
Language policy--Congresses.
Harvard subject headings:
Bilingualism--Congresses
Education, Bilingual--Congresses
Language policy--Congresses.
Princeton subject headings:
Bilingualism--Congresses.
Education, Bilingual--Congresses.
Language policy--Congresses.