Tiwari, Vijay Kumar. <br/><br/>
A Textbook of Environmental Studies 

 - New Delhi  Himalaya Publishing House  2012 
 - 432p.  Paperback  24 cm 
<br/><br/><label>ISBN: </label>9789350515167 
<br/><br/><label>Dewey Class. No.: </label>332.6