Columbia subject headings:
Díaz Ordaz, Gustavo, 1911-1979.
Mexico--Economic conditions--1918-
Working class--Mexico.
Harvard subject headings:
Díaz Ordaz, Gustavo, 1911-1979.
Mexico--Economic conditions--1918-
Working class--Mexico
Princeton subject headings:
Industrial relations--Mexico--History--20th century.
Mexico--Economic conditions--1918-
Mexico--Politics and government--1946-1970.