Columbia subject headings:
Merchant marine--Turkey--History.
Shipowners--Turkey--History.
Shipping--Turkey--History.
Turkey--History, Naval.
Harvard subject headings:
Merchant marine--Turkey--History.
Shipowners--Turkey--History.
Shipping--Turkey--History.
Turkey--History, Naval.
Princeton subject headings:
Merchant marine--Turkey--History.
Shipowners--Turkey--History.
Shipping--Turkey--History.
Turkey--History, Naval.