Columbia subject headings:
Finland--History--Congresses.
Finland--Relations--Soviet Union--Congresses.
Soviet Union--History--Congresses.
Soviet Union--Relations--Finland--Congresses.
Harvard subject headings:
Finland--History--18th century--Congresses.
Finland--History--Congresses.
Finland--Relations--Soviet Union--Congresses.
Soviet Union--History--Congresses.
Soviet Union--Relations--Finland--Congresses.
Princeton subject headings:
Finland--History--Congresses.
Finland--Relations--Russia--Congresses.
Russia--History--Congresses.
Russia--Relations--Finland--Congresses.