Asthana, D.K. <br/><br/>
Enviroment :  problems and solutions / 
D.K. Asthana. 
 - 2nd Rev. ed. 
 - Ram Nagar, New Delhi :  S.Chand,  2001. 
<br/><br/>includes bibliographical references. 
<br/><br/><label>ISBN: </label>8121916542 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Enviromental degradation<br/>Enviromental protection
<br/><br/><label>LC Class. No.: </label>GE140  / Ast 2001