Columbia subject headings:
Mexico--History--Conquest, 1519-1540.
Mexico--Relations--Spain.
Spain--Colonies--America.
Spain--Relations--Mexico.
Harvard subject headings:
Mexico--History--Conquest, 1519-1540
Mexico--Relations--Spain.
Spain--Colonies--America
Spain--Relations--Mexico.
Princeton subject headings:
Mexico--History--Conquest, 1519-1540.
Mexico--Relations--Spain.
Spain--Colonies--America.
Spain--Relations--Mexico.