Organization of the Petroleum Exporting Countries text Vienna OPEC 2016 N 67 hlm. 30 cm PETROLEUM 553.28 553.28 Org a ISSN 0474-6317 INLIS000000000000678 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)