Columbia subject headings:
Harvard subject headings:
Germany--Emigration and immigration
Germany--Emigration and immigration--Economic aspects.
Germany--Emigration and immigration--Political aspects.
Germany--Emigration and immigration--Social aspects.
Multiculturalism--Germany
Social integration--Germany
Princeton subject headings:
Emigration and immigration--Congresses.
Germany--Emigration and immigration--Congresses.
Multiculturalism--Germany--Congresses.
Social integration--Germany--Congresses.