Columbia subject headings:
Harvard subject headings:
Finland--Foreign relations--1917-1945.
Finland--Foreign relations--1945-
Finland--Foreign relations--Soviet Union.
Finland--Relations--Soviet Union.
Soviet Union--Foreign relations--1917-1945.
Soviet Union--Foreign relations--Finland.
Soviet Union--Foreign relations.
Soviet Union--Relations--Finland.
Princeton subject headings:
Finland--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Finland.