Columbia subject headings:
Assimilation (Sociology)
Foreign workers--Germany.
Germany--Emigration and immigration--Government policy.
Germany--Emigration and immigration--Social aspects.
Immigrants--Germany--Social conditions.
Immigrants--Government policy--Germany.
Social integration--Germany.
Harvard subject headings:
Germany--Emigration and immigration--Government policy.
Germany--Emigration and immigration--Social aspects.
Immigrants--Germany--Social conditions
Social integration--Germany.
Princeton subject headings: