Columbia subject headings:
Europe--Politics and government--1918-1945.
Germany--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Germany.
World War, 1939-1945.
Harvard subject headings:
Europe--Politics and government--1918-1945.
Germany--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Germany.
World War, 1939-1945.
Princeton subject headings:
Europe--Politics and government--1918-1945.
Germany--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Germany.
World War, 1939-1945.