Columbia subject headings:
Gas industry--Thailand.
Petroleum industry and trade--India.
Petroleum industry and trade--Thailand.
Harvard subject headings:
Petroleum industry and trade--Economic aspects--India.
Petroleum industry and trade--Economic aspects--Thailand.
Princeton subject headings:
India--Economic conditions--1947-
Petroleum industry and trade--Economic aspects--India.
Petroleum industry and trade--Economic aspects--Thailand.
Thailand--Economic conditions.