Columbia subject headings:
Finland--Foreign relations--Soviet Union.
Finland--History--Sources.
Russo-Finnish War, 1939-1940.
Soviet Union--Foreign relations--Finland.
Harvard subject headings:
Finland--Foreign relations--Soviet Union.
Finland--History--Sources.
Russo-Finnish War, 1939-1940
Soviet Union--Foreign relations--Finland.
Princeton subject headings:
Finland--Foreign relations--Soviet Union.
Finland--History--Sources.
Russo-Finnish War, 1939-1940.
Soviet Union--Foreign relations--Finland.