Yadan,P.R. <br/><br/>
A Text Book of Environmental Science 
Dr.P.R.Yadav 
 - New Delhi  Sonali Pub  2008 
 - 297p. 
<br/><br/> H.B 
<br/><br/><label>ISBN: </label>9788184111231 
<br/><br/><label>Dewey Class. No.: </label>363.7 YAD