Laporan PPM K021/2019: Laporan Menghadiri Seminar 'Advanced Seminar On Economic Geology And Mineral Resources' Di Universiti Malaya (UM) 1 Ogos 2019 Dr. Ismail Bin Ibrahim - Perak Pusat Penyelidikan Mineral, Jabatan Mineral Dan Geosains Malaysia 2019 - 8 p ill, col, photo 29 cm