Keisuke Ushijima, Hideki Mizunaga, Dzulkarnain Hj. Kamaruzzaman, Ishak bin Dun
Geophysical Exploration of Cavities at New Lahat Mine Area, Ipoh, Malaysia : RAK (L1)
Geophysical Exploration of Cavities at New Lahat Mine Area, Ipoh, Malaysia : RAK (L1)