Columbia subject headings:
Germany--Relations--Poland.
Poland--Politics and government--1796-1918.
Poland--Politics and government--1918-1945.
Poland--Relations--Germany.
Prussia, East (Poland and Russia)--Politics and government.
Public opinion--Poland.
Harvard subject headings:
Poland--Politics and government--1796-1918
Poland--Politics and government--1918-1945
Poland--Relations--Prussia, East (Poland and Russia)
Prussia, East (Poland and Russia)--Relations--Poland.
Princeton subject headings: