Columbia subject headings:
Baltic Sea Region--Relations--Poland.
John III Sobieski, King of Poland, 1629-1696.
Merchant marine--Poland--History.
Poland--History, Naval.
Poland--Relations--Baltic Sea Region.
Harvard subject headings:
Baltic Sea Region--Relations--Poland.
John III Sobieski, King of Poland, 1629-1696.
Merchant marine--Poland--History.
Poland--History, Naval.
Poland--Relations--Baltic Sea Region.
Princeton subject headings:
Baltic States--Commerce--Poland--History.
Baltic States--Foreign relations--Poland--History.
John III Sobieski, King of Poland, 1629-1696.
Poland--Commerce--Baltic States--History.
Poland--Foreign relations--Baltic States--History.