Ong Yeoh Han
Dolomite resources investigation in the vicinity of Sungai Siput (utara) - IM 11/1981 - Ipoh Perak Janatan penyiasatan Kajibumi Malaysia 1981 - ill:26p. 29.8 cm
Dolomite resources investigation in the vicinity of Sungai Siput (utara) - IM 11/1981 - Ipoh Perak Janatan penyiasatan Kajibumi Malaysia 1981 - ill:26p. 29.8 cm