Columbia subject headings:
Baltic States--Commerce--England--History.
England--Commerce--Baltic States--History.
England--Commerce--Poland--History.
Poland--Commerce--England--History.
Harvard subject headings:
Baltic States--Commerce--England--History.
Baltic States--Commerce--Great Britain--History--17th century.
England--Commerce--Baltic States--History.
England--Commerce--Poland--History.
Great Britain--Commerce--Baltic States--History--17th century.
Great Britain--Commerce--Poland--History--17th century.
Poland--Commerce--England--History.
Poland--Commerce--Great Britain--History--17th century.
Princeton subject headings:
Baltic States--Commerce--England--History.
England--Commerce--Baltic States--History.
England--Commerce--Poland--History.
Poland--Commerce--England--History.