Columbia subject headings:
Russia--Foreign relations--Turkey--Congresses.
Turkey--Foreign relations--Russia--Congresses.
Harvard subject headings:
Russia--Foreign relations--Turkey--Congresses.
Soviet Union--Foreign relations--Turkey--Congresses.
Turkey--Foreign relations--Russia--Congresses.
Turkey--Foreign relations--Soviet Union--Congresses.
Princeton subject headings:
Russia--Foreign relations--Turkey--Congresses.
Turkey--Foreign relations--Russia--Congresses.