Columbia subject headings:
Germany (East)--Relations--Poland--Sources.
Poland--Foreign relations--1945---Sources.
Poland--Relations--Germany (East)--Sources.
Harvard subject headings:
Germany--Relations--Poland--Sources.
Poland--Foreign relations--1945---Sources.
Poland--Relations--Germany--Sources.
Princeton subject headings:
Germany (East)--Relations--Poland--Sources.
Poland--Foreign relations--1945---Sources.
Poland--Relations--Germany (East)--Sources.