Columbia subject headings:
Mexico--Economic policy--1970-1994--Congresses.
Petroleum industry and trade--Government policy--Mexico--Congresses.
Petroleum industry and trade--Government policy--South America--Congresses.
South America--Economic policy--Congresses.
Harvard subject headings:
Mexico--Economic conditions--1970-1982.
Mexico--Economic conditions--1982-1994.
Mexico--Economic policy--1970-1994.
Petroleum industry and trade--Government policy--Mexico
Princeton subject headings: