Columbia subject headings:
Harvard subject headings:
Mexico--Economic conditions--1970-1982.
Mexico--Politics and government--1970-1988.
Mexico--Social conditions--1970-
Political parties--Mexico
Socialist parties--Mexico.
Princeton subject headings:
Mexico--Economic conditions--1970-1982.
Mexico--Politics and government--1970-.
Mexico--Social conditions--1970-
Political parties--Mexico.
Socialist parties--Mexico.