Ab Nizar Embi and Teoh Lay Hock
Production statistics for clay sand and rock based industries in Peninsular Malaysia 1986 - C 553 ABN - IM 3/1988 - Ipoh Perak Jabatan Penyiasatan Kajibumi Malaysia 1988 - ill:21p. 29.8 cm
Production statistics for clay sand and rock based industries in Peninsular Malaysia 1986 - C 553 ABN - IM 3/1988 - Ipoh Perak Jabatan Penyiasatan Kajibumi Malaysia 1988 - ill:21p. 29.8 cm