Asthana, D. K. <br/><br/>
A textbook of environmental studies/by 
D.K. Asthana and Meera Asthana 
 - New Delhi :    S. Chand & Company Ltd.,   2006. 
 - 470 p. :    ill. ;    24 cm. 
<br/><br/><label>ISBN: </label>9788121927642 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences  <br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>333.707   / AST