Pandjaitan, Maraudin text yoi Yogyakarta Gadjah Mada University Press 2002 Cet.1. ind xx, 297 hlm. ; 21 cm Maraudin Pandjaitan Bibliografi : hlm 296-297 INDUSTRI PETROKIMIA 338.476 338.476 Pan i 979-420-502-8 140403 20150908142907.0 INLIS000000000001699 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)