Columbia subject headings:
Germany--Boundaries--Poland.
Germany--Foreign relations--1933-1945--Poland.
Poland--Boundaries--Germany.
Poland--Foreign relations--1918-1945--Germany.
Harvard subject headings:
Germany--Boundaries--Poland.
Germany--Foreign relations--1933-1945--Poland.
Poland--Boundaries--Germany
Poland--Foreign relations--1918-1945--Germany.
Princeton subject headings: