Columbia subject headings:
Harvard subject headings:
Education, Bilingual--Congresses
German language--Acquisition--Congresses.
German language--Study and teaching (Elementary)--Foreign speakers--Congresses.
German language--Study and teaching--Foreign speakers--Congresses.
Language acquisition--Congresses.
Language and languages--Study and teaching--Congresses
Second language acquisition--Congresses.
Princeton subject headings:
German language--Study and teaching--Foreign speakers--Congresses.
Language acquisition--Congresses.
Language and languages--Study and teaching--Congresses.