Asthana, D.K. & Asthana, Meera <br/><br/>
Environment  problems and solutions 

 - S.Chand & Company, New Delhi  1998 
 - xii,323 
<br/><br/><label>ISBN: </label>81-219-1654-2 
<br/><br/><label>Dewey Class. No.: </label>301.3 Ast/Ast