Laporan PPM R005/2017 : Development Of New Quarry Particulate Pollution Index Formula For QPPI V1.3.2 Software, Disember 2017 Dr. Izhar Abadi b. Ibrahim Rais - Perak Pusat Penyelidikan Mineral, Jabatan Mineral Dan Geosains Malaysia 2017 - 65 p. ill, table, photo 29 cm

Includes bibliographical references