Columbia subject headings:
Germany--Foreign relations--1933-1945.
Germany--Foreign relations--Poland.
Poland--Foreign relations--Germany.
United States--Foreign relations--1933-1945--Sources.
United States--Foreign relations--1933-1945.
World War, 1939-1945--Causes.
Harvard subject headings:
Germany--Foreign relations--1933-1945.
Germany--Foreign relations--Poland.
Poland--Foreign relations--Germany
United States--Foreign relations--1933-1945--Sources.
United States--Foreign relations--1933-1945.
World War, 1939-1945--Causes.
Princeton subject headings:
Germany--Foreign relations--1933-1945.
Germany--Foreign relations--Poland.
Poland--Foreign relations--Germany.
United States--Foreign relations--1933-1945--Sources.
United States--Foreign relations--1933-1945.
World War, 1939-1945--Causes.