Ab Nizar Embi,Teoh Lay Hock <br/><br/>
Production statistics and directory of some industrial minerals manufacturing company in Peninsular Malaysia 

 - C 553 ABN - IM 3/1990 
 - Ipoh Perak  Jabatan Penyiasatan Kajibumi Malaysia  1990 
 - ill:73p. 29.8 cm