Aw,P C ,Ong, W S
1975 production statistics for crushed rocks bricks and gravel in peninsular Malaysia (RAK F2) - MX (N) 10 1976 - Ipoh Perak Jabatan Penyiasatan Kajibumi Malaysia 1976 - ill:11p. 29.8 cm
1975 production statistics for crushed rocks bricks and gravel in peninsular Malaysia (RAK F2) - MX (N) 10 1976 - Ipoh Perak Jabatan Penyiasatan Kajibumi Malaysia 1976 - ill:11p. 29.8 cm