Asthana, D. K. <br/><br/>
A textbook of environmental studies /  
D. K. Asthana and Meera Asthana 
 - New Delhi :   S. Chand & Company,  2007. 
 - xvii, 460p. :  ill. ;   24 cm 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9788121927642 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Science
<br/><br/><label>Dewey Class. No.: </label>363.7 AST