Ong, Y. H. <br/><br/>
The marble industry in the Kinta District, Perak / 
by Y. H.Ong 
 - Ipoh :  Jabatan Penyiasatan Kajibumi,  1980 
 - 15 p. 
 - Report of the Industrial Minerals Division; no.Im 8/1980 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marble industry and trade--Perak