Columbia subject headings:
Argentina--Economic conditions.
Mexico--Foreign relations--United States.
Mexico--History--1867-1910.
Mexico--History--Revolution, 1910-1920--Social aspects.
Social conflict--Mexico--History--20th century.
United States--Foreign relations--Mexico.
Harvard subject headings:
Mexico--Economic conditions.
Mexico--Foreign relations--United States.
Mexico--History--1867-1910.
Mexico--History--Revolution, 1910-1920--Social aspects.
Social conflict--Mexico--History--20th century.
United States--Foreign relations--Mexico.
Princeton subject headings:
Argentina--Economic conditions.
Mexico--Foreign relations--United States.
Mexico--History--1867-1910.
Mexico--History--Revolution, 1910-1920--Social aspects.
Social conflict--Mexico--History--20th century.
United States--Foreign relations--Mexico.