Columbia subject headings:
Foreign workers--Germany (West)--Bibliography.
Foreign workers--Government policy--Germany (West)
Germany (West)--Emigration and immigration--Bibliography.
Germany (West)--Emigration and immigration--Government policy.
Harvard subject headings:
Foreign workers--Germany (West)--Bibliography.
Foreign workers--Government policy--Germany (West)
Germany (West)--Emigration and immigration--Bibliography.
Germany (West)--Emigration and immigration--Government policy.
Princeton subject headings: