Columbia subject headings:
Mexico--Economic conditions--1982-1994.
Mexico--Social conditions--1970-
Polarization (Social sciences)
Harvard subject headings:
Mexico--Economic conditions--1982-1994.
Mexico--Social conditions--1970-
Polarization (Social sciences)
Princeton subject headings:
Mexico--Economic conditions--1982-1994--Congresses.
Mexico--Social conditions--1970---Congresses.
Social movements--Mexico--Congresses.
Working class--Mexico--Congresses.