Columbia subject headings:
Greece--Foreign relations--Russia.
Greece--Foreign relations--Soviet Union.
Russia--Foreign relations--Greece.
Soviet Union--Foreign relations--Greece.
Harvard subject headings:
Greece--Foreign relations--Russia.
Greece--Foreign relations--Soviet Union.
Russia--Foreign relations--Greece.
Soviet Union--Foreign relations--Greece.
Princeton subject headings:
Greece--Relations--Russia.
Greece--Relations--Soviet Union.
Russia--Relations--Greece.
Soviet Union--Relations--Greece.