Columbia subject headings:
Black Sea Coast (Turkey)--Congresses.
Black Sea Coast--Congresses.
Black Sea Coast--Foreign relations--Congresses.
Harvard subject headings:
Black Sea Coast (Turkey)--Congresses.
Black Sea Coast--Congresses.
Black Sea Coast--Foreign relations--Congresses.
Princeton subject headings:
Black Sea Coast (Turkey)--Congresses.
Black Sea Coast--Congresses.
Black Sea Coast--Foreign relations--Congresses.