Columbia subject headings:
Harvard subject headings:
Aristocracy (Social class)--Spain--Castile--History.
Castile (Spain)--Economic conditions.
Monetary policy--Spain--Castile--History.
Nobility--Spain--Castile--History.
Power (Social sciences)--Spain--Castile--History.
Seigniorage (Finance)--Spain--Castile--History.
Upper class--Spain--Castile--History.
Princeton subject headings:
Aristocracy (Social class)--Spain--Castile--History.
Castile (Spain)--Economic conditions.
Power (Social sciences)--Spain--Castile--History.