Columbia subject headings:
Harvard subject headings:
Energy industries--Ecuador.
Energy industries--Mexico.
Investments, Chinese--Ecuador.
Investments, Chinese--Mexico.
Investments, Russian--Ecuador.
Investments, Russian--Mexico.
Princeton subject headings:
Energy industries--Government policy--Ecuador.
Energy industries--Government policy--Mexico.
Latin America--international economic relations.
Mexico--international economic relations--China.
Mexico--international economic relations--Russia.