OPEC, its member states and the world energy market

Xehetasun bibliografikoak
Egile nagusia:	Evans, John
Formatua:	Liburua
Hizkuntza:	English
Argitaratua:	Harlow, Essex, U.K. Longman c1986.
Gaiak:	Organization of Petroleum Exporting Countries. Petroleum industry and trade. Gas industry.