Columbia subject headings:
Harvard subject headings:
Europe, Central--Languages--Congresses.
German language--Europe, Central--Congresses.
German language--Study and teaching--Europe, Central--Congresses.
German philology--Congresses.
Second language acquisition--Congresses.
Princeton subject headings:
Europe, Central--Languages--Congresses.
German language--Europe, Central--Congresses.
German language--Study and teaching--Europe, Central--Congresses.
German philology--Congresses.
Second language acquisition--Congresses.