Columbia subject headings:
Petroleum industry and trade--Government ownership--Latin America--Case studies.
Petroleum industry and trade--Latin America--Case studies.
Harvard subject headings:
Petroleum industry and trade--Government ownership--Latin America--Case studies.
Petroleum industry and trade--Latin America--Case studies.
Princeton subject headings:
Petroleum industry and trade--Government ownership--Latin America--Case studies.
Petroleum industry and trade--Latin America--Case studies.