GUPTA`S.R <br/><br/>
UGC NET/SLET ENVIRONMENTAL SCIENCE PAPER II AND III 

 - 1st Ed. 
 - NEW DELHI  RAMESH PUBLISHING HOUSE   2010 
<br/><br/><label>ISBN: </label>9788178127224 
<br/><br/><label>Dewey Class. No.: </label>150.194 4  / GUP/U