Columbia subject headings:
Soviet Union--Foreign relations--1917-1945.
World War, 1939-1945--Causes.
World War, 1939-1945--Diplomatic history.
World politics--1933-1945.
Harvard subject headings:
Soviet Union--Foreign relations--1917-1945.
World War, 1939-1945--Causes.
World War, 1939-1945--Diplomatic history.
World politics--1933-1945
Princeton subject headings:
Soviet Union--Foreign relations--1917-1945.
World War, 1939-1945--Causes.
World War, 1939-1945--Diplomatic history.
World politics--1933-1945.