Asthana, D. K. <br/><br/>
A textbook of environmental studies :  for undergraduate students : as per UGC syllabus / 
D. K. Asthana, Meera Asthana 
 - New Delhi :  S. Chand & Company,  2006 
 - 460 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>8121927641 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences<br/>Pollution