Columbia subject headings:
Economic history--Medieval, 500-1500.
Galicia (Spain : Region)--Commerce--History.
Merchant marine--Spain--Galicia (Region)--History.
Shipping--Spain--Galicia (Region)--History.
Harvard subject headings:
Economic history--Medieval, 500-1500
Galicia (Spain : Region)--Commerce--History.
Merchant marine--Spain--Galicia (Region)--History.
Shipping--Spain--Galicia (Region)--History.
Princeton subject headings:
Commerce--Medieval, 500-1500.
Galicia (Spain : Region)--Commerce--History.
International trade--History.
Shipping--Spain--Galicia (Region)--History.
Trade routes--Spain--Galicia (Region)--History.