Columbia subject headings:
Comparative government.
Mexico--Politics and government--19th century.
Political science--Mexico--History--19th century.
Political science--Spain--History--19th century.
Spain--Politics and government--19th century.
Harvard subject headings:
Comparative government
Mexico--History--19th century
Mexico--Politics and government--19th century
Spain--History--19th century.
Spain--Politics and government--19th century.
Princeton subject headings:
Comparative government.
Mexico--History--19th century.
Mexico--Politics and government--19th century.
Spain--History--19th century.
Spain--Politics and government--19th century.