Columbia subject headings:
Mexico--Economic policy.
Mexico--Politics and government.
Petroleum industry and trade--Government ownership--Mexico.
Petroleum industry and trade--Government policy--Mexico.
Petroleum industry and trade--Mexico--History.
Privatization--Mexico.
Harvard subject headings:
Petroleum industry and trade--Mexico
Petróleos Mexicanos
Privatization--Mexico.
Princeton subject headings:
Petroleum industry and trade--Mexico.
Petróleos Mexicanos.
Privatization--Mexico.