Columbia subject headings:
Harvard subject headings:
German language--Study and teaching--Germany--Darmstadt--Congresses.
Language acquisition--Congresses.
Language and languages--Study and teaching--Germany--Darmstadt--Congresses.
Multilingualism--Germany--Darmstadt--Congresses.
Technische Universität Darmstadt. Fachgebiet Sprachwissenschaft--History--Congresses.
Princeton subject headings:
German language--Study and teaching--Congresses.
Multilingualism--Congresses.