Ooi, A. C. <br/><br/>
Preliminary investigation of silica sand deposits in the Dindings District, Perak / 
by A. C. Ooi 
 - Ipoh :  Jabatan Penyiasatan Kajibumi,  1979 
 - 21 p. 
 - Report of the Industrial Minerals Division; no.Im 4/1979 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sand, Glass--Perak<br/>Investigative reporting--Perak