Kesehatan dan Keselamatan Kerja John Ridley text Jakarta Penerbir Erlangga 2009 Ed. 3; Cet. 1 xii, 314 hlm. ; 25 cm Program Keamanan Umum 363.1 363.1 JOH k 978-979-033-459-5 20180813124144 INLIS000000000000416 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)