Columbia subject headings:
Germany--Historiography.
Germany--Relations--Poland.
Poland--Historiography.
Poland--Relations--Germany.
Harvard subject headings:
Germany--Historiography.
Germany--Relations--Poland.
Poland--Historiography
Poland--Relations--Germany
Princeton subject headings:
Germany--Foreign relations--Poland.
Germany--Historiography--History.
Poland--Foreign relations--Germany.
Poland--Historiography--History.