Columbia subject headings:
Germany--Relations--Soviet Union.
Hitler, Adolf, 1889-1945.
Soviet Union--Relations--Germany.
World War, 1939-1945--Causes.
World War, 1939-1945--Diplomatic history.
World War, 1939-1945--Soviet Union.
Harvard subject headings:
Germany--Relations--Soviet Union.
Hitler, Adolf, 1889-1945
Soviet Union--Relations--Germany.
World War, 1939-1945--Causes.
World War, 1939-1945--Diplomatic history.
World War, 1939-1945--Soviet Union.
Princeton subject headings: