Ooi, A. C. <br/><br/>
A limestone investigation of Gunong Tasek and part of the Eastern portion of Gunong Lang / 
by A. C. Ooi 
 - Ipoh :  Jabatan Penyiasatan Kajibumi,  1978 
 - 39 p. :  ill. 
 - Report of the Industrial Minerals Division; no.MX(N)25/1978 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Limestone--Perak<br/>Investigative reporting--Perak