Srivastava, Smriti. <br/><br/>
Environment and Ecology 

 - 1st 
 - New Delhi   S.K. Kataria & Sons  2009 
 - 262p. 
<br/><br/><label>ISBN: </label>9789380027067 
<br/><br/><label>Dewey Class. No.: </label>577.27  / Sri-E