Tiwari, Manoj <br/><br/>
Environmental Studies / 
by Manoj Tiwari, Kapil Khulbe and Tiwari 
 - New Delhi :  I.K.International Publishing House Pvt. Ltd.  c2007 
 - xvi, 272p.:  illu. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>8188237825 
<br/><br/><label>LC Class. No.: </label>TD195  / .P88 2002