Columbia subject headings:
Foreign workers, Polish--Germany--Congresses.
Poland--Emigration and immigration--Congresses.
Women foreign workers--Germany--Congresses.
Women household employees--Germany--Congresses.
Harvard subject headings:
Foreign workers, Polish--Germany--Congresses.
Poland--Emigration and immigration--Congresses.
Women foreign workers--Germany--Congresses.
Women household employees--Germany--Congresses.
Women immigrants--Employment--Germany--Congresses.
Princeton subject headings:
Foreign workers, Polish--Germany--Congresses.
Poland--Emigration and immigration--Congresses.
Women foreign workers--Germany--Congresses.
Women household employees--Germany--Congresses.
Women immigrants--Employment--Germany--Congresses.