Patnaik,  Prabhat <br/><br/>
A textbook of environmental science 
/ by Prabhat Patnaik 
 - Delhi:  Wisdom Press,  2011. 
 - 340p. 
<br/><br/><label>ISBN: </label>9789380199726 
<br/><br/><label>Dewey Class. No.: </label>628  / PAT/A