Columbia subject headings:
America--Commerce--Spain--History--17th century.
Galleons--Spain--History--17th century.
Shipbuilding industry--Spain--History--17th century.
Spain--Commerce--America--History--17th century.
Spain. Armada--History--17th century.
Harvard subject headings:
America--Commerce--Spain--History--17th century.
Galleons--Spain--History--17th century.
Shipbuilding industry--Spain--History--17th century.
Spain--Commerce--America--History--17th century.
Spain. Armada--History--17th century.
Princeton subject headings:
Galleons--Spain--History.
Shipbuilding--Spain--History.
Spain--History, Naval.