Columbia subject headings:
Mexico--Economic conditions.
Mexico--History, Local.
Mexico--Politics and government--1867-1910.
Mexico--Social conditions.
Harvard subject headings:
Mexico--Economic conditions.
Mexico--History, Local.
Mexico--Politics and government--1867-1910
Mexico--Social conditions.
Princeton subject headings:
Mexico--Economic conditions.
Mexico--History, Local.
Mexico--Politics and government--1867-1910.
Mexico--Social conditions.