Columbia subject headings:
Copper industry and trade--Government ownership--South America--Case studies.
Corporations, American--South America--Case studies.
International relations.
Petroleum industry and trade--Government ownership--South America--Case studies.
Harvard subject headings:
Copper industry and trade--Government ownership--South America--Case studies.
Corporations, American--South America--Case studies.
Petroleum industry and trade--Government ownership--South America--Case studies.
Princeton subject headings:
Copper industry and trade--Government ownership--South America--Case studies.
Corporations, American--South America--Case studies.
Petroleum industry and trade--Government ownership--South America--Case studies.