Asthana D K <br/><br/>
A Textbook of environmenal studies 

 - New Delhi  A Chand & co  2010 
 - xvii,460p.;24.5cm 
<br/><br/><label>ISBN: </label>81-219-2784-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciemce