Mason, F. <br/><br/>
Clay investigation in the granite terrain between Tapah and Ringlet, Tapah, Gunong Kanthan area 
Mason F. 
 -  1963 
 - 43 p.  ill.  34 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sediments (Geology)--Perak
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Perak