Columbia subject headings:
Fisheries--Greece.
Greece--History, Naval.
Merchant marine--Greece--History.
Navigation--Greece--History.
Harvard subject headings:
Fisheries--Greece.
Greece--History, Naval.
Merchant marine--Greece--History.
Navigation--Greece--History.
Princeton subject headings:
Fisheries--Greece.
Greece--History, Naval.
Merchant marine--Greece--History.
Navigation--Greece--History.