Deepika Singla <br/><br/>
NTA UGC net set jrf Environmental Scinece:  paper 2 
Vivek Sharma, Jaikrit Singh, Shivani Sharma 
 - New Delhi  Arihant 
 - 691 p.; 
<br/><br/><label>ISBN: </label>9789313199762 
<br/><br/><label>Dewey Class. No.: </label>371.26  / DEE