OPEC bulletin.

Manylion Llyfryddiaeth
Awdur Corfforaethol:	Organization of Petroleum Exporting Countries
Fformat:	Continuing Resource
Iaith:	English
Cyhoeddwyd:	Vienna Organization of the Petroleum Exporting Countries Austria
Pynciau:	Organization of Petroleum Exporting Countries > Periodicals. Petroleum industry and trade > Periodicals. Organization of Petroleum Exporting Countries.