Columbia subject headings:
Marine insurance--Croatia--Dubrovnik--History--16th century.
Shipping--Mediterranean Sea--History--16th century.
Harvard subject headings:
Marine insurance--Croatia--Dubrovnik--History--16th century.
Shipping--Mediterranean Sea--History--16th century.
Princeton subject headings:
Dubrovnik (Croatia)--Commerce--History.
Marine insurance--Dubrovnik (Croatia)--History.