Sinha, Shradha  <br/><br/>
A text book of environmental studies/  	 
Shradha Sinha, Manisha Shukla and Ranjana Shukla 
 - New Delhi :   AITBS Publishers and Distributors,   c2005. 
 - xxiii, 323 pages :   illustratiions ;   22cm. 
<br/><br/>Includes index.<br/>