44643document2016IEK_205_-_TEKNOLOGI_KAWALAN_PENCEMARAN_UDARA_APRIL-MEI_06.pdfapplication/pdf5007722013-07-13 00:43:55http://eprints.usm.my/1305/1/IEK_205_-_TEKNOLOGI_KAWALAN_PENCEMARAN_UDARA_APRIL-MEI_06.pdf