Columbia subject headings:
Foreign workers--Germany (West)
Foreign workers--Switzerland.
Germany (West)--Emigration and immigration.
Switzerland--Emigration and immigration.
Harvard subject headings:
Foreign workers--Germany (West)
Foreign workers--Switzerland
Germany (West)--Emigration and immigration.
Immigrants--Germany (West)
Immigrants--Switzerland
Switzerland--Emigration and immigration.
Princeton subject headings:
Foreign workers--Germany (West)
Foreign workers--Switzerland.
Germany (West)--Emigration and immigration.
Immigrants--Germany (West)
Immigrants--Switzerland.
Switzerland--Emigration and immigration.