OPEC bulletin.
Bulletin Organization of Petroleum Exporting Countries bulletin Organization of the Petroleum Exporting Countries bulletin
- Vienna, Austria : Organization of the Petroleum Exporting Countries 1990-1991.
- v. : ill. ; 25-30 cm.
- Ten no. a year, <2007->
- Ten no. a year, <1987>-1996 Monthly, 1997-2002 Bimonthly, 2003-
- Began with: Nov. 1966.