Columbia subject headings:
Mexico--Economic conditions--1970-1982.
Mexico--Politics and government--1946-1970.
Harvard subject headings:
Mexico--Economic conditions--1970-1982--Congresses.
Mexico--Economic policy--1970---Congresses.
Mexico--Economic policy--1970-1994--Congresses.
Mexico--Politics and government--1970-1988.--Congresses.
Princeton subject headings:
Mexico--Economic conditions--1970-1982.
Mexico--Politics and government--1946- .