Tiwari, Vijay Kumar <br/><br/>
A text book of environmental studies 

 - 1 
 - Mumbai  Himalaya Publishing House  2010 
 - 432 
<br/><br/><label>ISBN: </label>9788184886405 
<br/><br/><label>Dewey Class. No.: </label>370.1  / PIW/TEX