Columbia subject headings:
Harvard subject headings:
Aragon (Spain)--History.
Catalonia (Spain)--Commerce--History.
Catalonia (Spain)--History.
Shipping--Spain--Catalonia--History.
Princeton subject headings:
Catalonia (Spain)--Commerce--History.
Catalonia (Spain)--Commerce--Italy--History.
Italy--Commerce--Catalonia--History.
Shipping--Spain--Catalonia--History.