Columbia subject headings:
Language acquisition--Congresses.
Language and languages--Congresses.
Linguistics--Congresses.
Harvard subject headings:
Language acquisition--Congresses.
Language and languages--Congresses
Linguistics--Congresses
Princeton subject headings:
Language acquisition--Congresses.
Language and languages--Congresses.
Language and languages--Study and teaching--Congresses.
Linguistics--Congresses.