Columbia subject headings:
Harvard subject headings:
France--Emigration and immigration--Congresses.
Germany--Emigration and immigration--Congresses.
Immigrants--France--Congresses.
Immigrants--Germany--Congresses.
Princeton subject headings:
Assimilation (Sociology)--Congresses.
Emigration and immigration--International cooperation--Congresses.
France--Emigration and immigration--Congresses.
France--Emigration and immigration--Government policy--Congresses.
Germany--Emigration and immigration--Congresses.
Germany--Emigration and immigration--Government policy--Congresses.