OPEC Bulletin http://magz.yabesh.ir/magz/handle/emyd/1317 2026-06-07T21:36:30Z OPEC Bulletin 2017 (Vol XLVIII) (issue 01) http://magz.yabesh.ir/magz/handle/emyd/6279 OPEC Bulletin 2017 (Vol XLVIII) (issue 01) 2017-01-01T00:00:00Z