Columbia subject headings:
Black Sea Region--Congresses.
Harvard subject headings:
Black Sea Region--Congresses.
Turkey--Foreign economic relations.
Princeton subject headings:
Asia, Central--Foreign economic relations--Turkey--Congresses.
Black Sea Coast Region (Turkey)--Economic conditions--Congresses.
Caucasus--Foreign economic relations--Turkey--Congresses.
Tourism--Turkey--Black Sea Coast Region--Congresses.
Turkey--Foreign economic relations--Asia, Central--Congresses.
Turkey--Foreign economic relations--Caucasus--Congresses.