Columbia subject headings:
Spain--Colonies--America--Administration.
Spain--Colonies--America--Economic policy.
Spain--Colonies--America--Social policy.
Harvard subject headings:
Spain--Colonies--Administration.
Spain--Colonies--America--Economic policy.
Spain--Colonies--America--Social policy.
Princeton subject headings:
Spain--Colonies--America--Administration.
Spain--Colonies--America--Economic policy.
Spain--Colonies--America--Social policy.