Laporan PPM R008/2017: Assessment Of Prediction Model For PM2.5 At Quarry Site: Proposal For New QDDRM Software Module December 2017 Dr Izhar Abadi Bin Ibrahim Rais - Perak Pusat Penyelidikan Mineral, Jabatan Mineral Dan Geosains Malaysia 2017 - 76 p ill, col, photo 29 cm