Columbia subject headings:
Poland--Politics and government--1572-1763.
Poland--Relations--Germany--Prussia--History.
Prussia (Germany)--Politics and government--17th century.
Prussia (Germany)--Relations--Poland--History.
Harvard subject headings:
Brandenburg (Germany : State)--Foreign relations--Poland.
Poland--Foreign relations--Germany--Brandenburg.
Poland--Foreign relations--Prussia (Duchy)
Prussia (Duchy)--Foreign relations--Poland.
Prussia (Duchy)--History.
Princeton subject headings:
Poland--Politics and government--1572-1763.
Poland--Relations--Prussia (Germany)--History.
Prussia (Germany)--Politics and government--17th century.
Prussia (Germany)--Relations--Poland--History.