Teoh, Lay Hock <br/><br/>
Clay and sand investigation in the Sungai Petani area 
Teoh Lay Hock 
 - Ipoh, Perak  Ibu Pejabat Penyiasatan Kajibumi Malaysia  1974 
 - 4 p.  30 cm. 
<br/><br/> This project was undertaken at the request from Pernas to locate areas in the vicinity of Sungai Petani showing promising deposits of clay and sand suitable for the manufacture of wall tiles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clay--Sungai Petani--Kedah