KHIEV, SIDA. <br/><br/>
Study on water quality in mekong river, សិក្សាគុណភាពទឹកនៅទន្លេមេគង្គ 

 - Phnom Penh  RUA  2012 
 - ix; 29p.  ill.  29cm. 
<br/><br/><label>Dewey Class. No.: </label>GRS KHI 2009 B337 Or.1