Columbia subject headings:
Harvard subject headings:
Coinage--Spain--History--17th century.
Copper coins--Spain--History--17th century.
Copper coins--Spain.
Currency question--Spain--History.
Money--Spain--History.
Money--Spain--Statistics.
Precious metals--Spain--History--17th century.
Precious metals--Spain.
Spain--Economic conditions--17th century.
Princeton subject headings:
Coinage--Spain--History--17th century.
Copper coins--Spain--History--17th century.
Precious metals--Spain--History--17th century.
Spain--Economic conditions.