Columbia subject headings:
Germany--Foreign relations--1933-1945--Sources.
Germany--Foreign relations--Soviet Union--Sources.
Soviet Union--Foreign relations--1917-1945--Sources.
Soviet Union--Foreign relations--Germany--Sources.
World politics--1933-1945--Sources.
Harvard subject headings:
Germany--Foreign relations--1933-1945--Sources.
Germany--Foreign relations--Soviet Union--Sources.
Soviet Union--Foreign relations--1917-1945--Sources.
Soviet Union--Foreign relations--Germany--Sources.
World politics--1933-1945--Sources.
Princeton subject headings: