Columbia subject headings:
Gran Canaria (Canary Islands)--Commerce.
Shipbuilding--Canary Islands--Gran Canaria--History.
Shipping--Canary Islands--Gran Canaria--History.
Harvard subject headings:
Gran Canaria (Canary Islands)--Commerce.
Shipbuilding--Canary Islands--Gran Canaria--History.
Shipping--Canary Islands--Gran Canaria--History.
Princeton subject headings: