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

 - NEW DELHI  S. CHAND PUBLISHING  2016 
 - 397  ill.  24 CM 
<br/><br/><label>ISBN: </label>978-81-219-2764-2 
<br/><br/><label>Dewey Class. No.: </label>333.7  / AST