Columbia subject headings:
Harvard subject headings:
Foreign workers, Swedish--Germany, Northern--History.
Germany, Northern--Emigration and immigration--History.
Migrant labor--Germany, Northern--History.
Sweden--Emigration and immigration--History.
Swedes--Germany, Northern--History.
Princeton subject headings:
Foreign workers, Swedish--Germany.
Germany--Emigration and immigration.
Germany--History--1871-1918.
Sweden--Emigration and immigration.