Kajian Punca-punca Air bagi Kedah/Perlis/Pulau Pinang 

 - Pejabat Galian Kulim, Kedah  [date of publication not identified] 
 - p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water Resources<br/>General.<br/>WATER.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Malaysia, Kedah.