Columbia subject headings:
Harvard subject headings:
Europe--Emigration and immigration--Government policy.
Europe--Emigration and immigration.
Germany--Emigration and immigration--Government policy.
Germany--Emigration and immigration.
Migrations of nations
Social integration--Europe.
Social integration--Germany.
Princeton subject headings:
Cultural pluralism--Europe.
Cultural pluralism--Germany.
Culture conflict--Europe.
Culture conflict--Germany.
Europe--Emigration and immigration--Government policy.
Europe--Ethnic relations.
Germany--Emigration and immigration--Government policy.
Germany--Ethnic relations.