Columbia subject headings:
Foreign workers--Germany--History.
Spaniards--Germany.
Harvard subject headings:
Foreign workers--Germany--History.
Spaniards--Germany.
Princeton subject headings:
Foreign workers, Spanish--Germany (West).
Foreign workers, Spanish--Germany--History.
Germany (West)--Emigration and immigration.
Germany--Emigration and immigration--History.
Spain--Emigration and immigration--History.
Spaniards--Germany (West).
Spaniards--Germany--History.