Columbia subject headings:
Harvard subject headings:
German language--Study and teaching (Higher)--Foreign speakers--Congresses.
German language--Study and teaching--Foreign speakers--Congresses.
Language and languages--Research--Congresses.
Second language acquisition--Congresses.
Princeton subject headings:
German language--Study and teaching--Foreign speakers--Congresses.
Language and languages--Research--Congresses.
Second language acquisition--Congresses.