Columbia subject headings:
Soviet Union--Defenses.
Soviet Union--Foreign relations.
World War, 1939-1945--Soviet Union.
Harvard subject headings:
Soviet Union--Defenses.
Soviet Union--Foreign relations--1917-1945.
World War, 1939-1945--Soviet Union.
Princeton subject headings:
Soviet Union--Defenses.
Soviet Union--Foreign relations--1917-1945.
World War, 1939-1945--Russia.