Singh, Gajraj. <br/><br/>
Handbook of water purity and quality / 
by Gajraj Singh. 
 - New Delhi :  SBS Publishers & Distributors,  2012. 
 - 371 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9789380090238 (hbk.)  RM256.80 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution.<br/>Water quality management.<br/>Water quality--Measurement.<br/>Water--Purification