Columbia subject headings:
Europe, German-speaking--20th century--Congresses.
German language--Study and teaching--Foreign speakers--Congresses.
Germany--Emigration and immigration--History--20th century--Congresses.
Immigrants--Cultural assimilation--Europe, German-speaking--Congresses.
Linguistics--Europe, German-speaking--20th century--Congresses.
Harvard subject headings:
Europe, German-speaking--20th century--Congresses.
German language--Study and teaching--Foreign speakers--Congresses.
Germany--Emigration and immigration--History--20th century--Congresses.
Immigrants--Cultural assimilation--Europe, German-speaking--Congresses.
Linguistics--Europe, German-speaking--20th century--Congresses.
Princeton subject headings:
Europe, German-speaking--20th century--Congresses.
German language--Study and teaching--Foreign speakers--Congresses.
Germany--Emigration and immigration--History--20th century--Congresses.
Immigrants--Cultural assimilation--Europe, German-speaking--Congresses.
Linguistics--Europe, German-speaking--20th century--Congresses.