Columbia subject headings:
Baltic States--Foreign relations--Soviet Union.
Finland--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Baltic States.
Soviet Union--Foreign relations--Finland.
Harvard subject headings:
Baltic States--Foreign relations--Soviet Union.
Finland--Foreign relations--Soviet Union.
Russification--Baltic States.
Russification--Finland.
Soviet Union--Foreign relations--Baltic States.
Soviet Union--Foreign relations--Finland.
Princeton subject headings:
Baltic States--Foreign relations--Russia.
Finland--Foreign relations--Russia.
Russia--Foreign relations--Baltic States.
Russia--Foreign relations--Finland.