OPEC.
OPEC.
Organization of Petroleum Exporting Countries.
- Austria: Vienna, Austria ; 1989.
- 91 p. ; 32 cm.
- OPEC series, 1. .
3901139001
Petroleum industry and trade.
665.540538 / MOO 1989
3901139001
Petroleum industry and trade.
665.540538 / MOO 1989