Columbia subject headings:
Byzantine Empire--History, Naval--Congresses.
Law of the sea--Greece--Congresses.
Law of the sea--Turkey--Congresses.
Merchant marine--Greece--History--Congresses.
Shipping--Greece--History--Congresses.
Harvard subject headings:
Greece--History, Naval--Congresses.
Navigation--Greece--Congresses.
Princeton subject headings:
Greece--History, Naval--Congresses.
Navigation--Greece--Congresses.