Ab Nizar Embi ,Teoh Lay Hock <br/><br/>
Directory of construction sand/gravel producers in peninsular Malaysia 1986 

 - C 553 ABN - IM 4/1988 
 - Ipoh Perak  Jabatan Penyiasatan Kajibumi Malaysia  1986 
 - ill:35p. 29.8 cm