Columbia subject headings:
Harvard subject headings:
Castile (Spain)--Commerce--History--16th century.
Customs administration--Spain--Castile--History--16th century.
Spain--History--Philip II, 1556-1598.
Princeton subject headings:
Castile (Spain)--Commerce--History.
Castile (Spain)--Foreign economic relations.
Spain--History--Philip II, 1556-1598.