Laporan PPM R006/2017: Evaluation Of Air Quality Near Crusher Plant Using High Volume Sampler And Dust Deposit Gauge For QPIN Software Development, Desember 2017 Dr Izhar Abadi Bin Ibrahim Rais - Perak Pusat Penyelidikan Mineral, Jabatan Mineral Dan Geosains Malaysia 2017 - 39 p ill, col, photo 29 cm