DR. D.K.ASTHANA <br/><br/>
A TEXTBOOK OF ENVIRONMENTAL STUDIES 

 - 2ND 
 - NEW DELHI  S.CHAND PUBLICATION  2016 
 - 397  ill.  21 CM 
<br/><br/><label>ISBN: </label>978-81-219-2764-2 
<br/><br/><label>Dewey Class. No.: </label>333.7  / AST