Columbia subject headings:
Harvard subject headings:
Foreign workers--Germany.
Foreign workers--Netherlands
Germany--Emigration and immigration--Government policy.
Netherlands--Emigration and immigration--Government policy.
Social integration--Germany.
Social integration--Netherlands.
Princeton subject headings:
Foreign workers--Germany.
Foreign workers--Netherlands.
Germany--Emigration and immigration--Government policy.
Netherlands--Emigration and immigration--Government policy.
Social integration--Germany.
Social integration--Netherlands.