Columbia subject headings:
Germany--Foreign relations--Poland--Exhibitions.
Poland--Foreign relations--Germany--Exhibitions.
Poland--History--Occupation, 1939-1945--Exhibitions.
Harvard subject headings:
Germany--Foreign relations--Poland--Exhibitions.
Germany--History--1933-1945--Exhibitions.
Poland--Foreign relations--Germany--Exhibitions.
Poland--History--Occupation, 1939-1945--Exhibitions.
Princeton subject headings:
Germany--Foreign relations--Poland--Exhibitions.
Poland--Foreign relations--Germany--Exhibitions.
Poland--History--Occupation, 1939-1945--Exhibitions.