Asthana,D.K. <br/><br/>
A tex book of environmental studies   

 - 1st /   2006. 
 - N.Delhi:  S.Chand.  2006. 
 - 460p:  22cm. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Environmental science.
<br/><br/><label>Dewey Class. No.: </label>574.52