Columbia subject headings:
Aztecs--Economic conditions.
Aztecs--Politics and government.
Mexico--Economic conditions.
Mexico--Politics and government.
New Spain--Economic conditions.
New Spain--Politics and government.
Spain--Colonies--Administration.
Harvard subject headings:
Aztecs--Economic conditions.
Aztecs--Politics and government
Mexico--Economic conditions.
Mexico--Politics and government
New Spain--Economic conditions.
New Spain--Politics and government.
Spain--Colonies--Administration.
Princeton subject headings:
Aztecs--Mexico--Politics and government.
Aztecs--Mexico--Social conditions.
Mexico--History.
Mexico--Politics and government.
Mexico--Social conditions.