Columbia subject headings:
Harvard subject headings:
Brandt, Willy, 1913-1992--Congresses.
Germany (West)--Foreign relations--Poland--Congresses.
Poland--Foreign relations--Germany (West)--Congresses.
Princeton subject headings:
Brandt, Willy, 1913-1992.
Germany (West)--Foreign relations--Poland.
Poland--Foreign relations--Germany (West).