Columbia subject headings:
South America--Defenses--History.
Spain--History, Naval--16th century.
Spain--History, Naval--17th century.
Spain--History.
West Indies--Defenses--History.
Harvard subject headings:
Coast defenses--Latin America--History.
Pirates--Latin America--History.
Spain--Colonies--America--Defenses--History.
Spain--Colonies--Defenses--America--History.
Spain--History, Naval.
Spain. Armada--History.
Princeton subject headings:
Spain--History, Naval--16th century.
Spain--History, Naval--17th century.
Spain. Armada--History--16th century.
Spain. Armada--History--17th century.