Ong, Y. H. <br/><br/>
Dolomite resource investigation in the vicinity of Sungai Siput [Utara] Perak / 
by Y. H. Ong 
 - Ipoh :  Jabatan Penyiasatan Kajibumi,  1981 
 - 26 p. 
 - A report of the Industrial Minerals Division; no.Im 11/1981 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dolomite--Perak<br/>Investigative reporting--Perak