Columbia subject headings:
Energy consumption--Developing countries.
Energy industries--Developing countries.
Petroleum industry and trade--Developing countries.
Renewable energy sources--Developing countries.
Harvard subject headings:
Energy consumption--Developing countries.
Energy industries--Developing countries.
Petroleum industry and trade--Developing countries
Renewable energy sources--Developing countries
Princeton subject headings:
Energy consumption--Developing countries.
Energy industries--Developing countries.
Petroleum industry and trade--Developing countries.
Renewable energy sources--Developing countries.