Columbia subject headings:
Finance, Public--Spain--Colonies--History.
Stamp duties--Spain--Colonies.
Taxation--Law and legislation--Spain--Colonies.
Harvard subject headings:
Spain--Colonies--America--Economic policy.
Stamp duties--Latin America--History--16th century.
Stamp duties--Latin America--History--17th century.
Stamp duties--Spain--History.
Taxation--Latin America--History.
Princeton subject headings:
Finance, Public--Spain--Colonies--America--History.
Stamp duties--Spain--Colonies--America.
Taxation--Law and legislation--Spain--Colonies--America.