Columbia subject headings:
Harvard subject headings:
Germany--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Germany.
World War, 1939-1945--Diplomatic history--Sources.
World War, 1939-1945--Diplomatic history.
Princeton subject headings:
Germany--Foreign relations--Soviet Union--Sources.
Soviet Union--Foreign relations--Germany--Sources.
World War, 1939-1945--Diplomatic history--Sources.