Columbia subject headings:
Harvard subject headings:
Germany--Social policy--Congresses.
Immigrants--Government policy--Germany--Congresses.
Labor market--Germany--History--Congresses.
Multiculturalism--Germany--History--Congresses.
Social integration--Government policy--Germany--Congresses.
Princeton subject headings:
Emigration and immigration--Economic aspects--Congresses.
Emigration and immigration--Social aspects--Congresses.
Germany--Emigration and immigration--Congresses.
Multiculturalism--Congresses.