text Yogyakarta Gadjah Mada University Press 2004 Cet. 1 ind xiv, 145 hlm ilus 21 cm Achmadi Budi Cahyono Keselamatan kerja 331.25 979-424-543-5 20090227030858.0 YOGYA-02090000045336 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)