Asthana, D. K. . <br/><br/>
Environment: Problems and Solutions /  Textual Documents 
D. K. Asthana, Meera Asthana. 
 - 2nd rev ed / 
 - New Delhi :  S Chand & Co Ltd ,  2001. 
 - 434p ;  28 cm. 
<br/><br/><label>ISBN: </label> HB 
<br/><br/><label>Subjects--Index Terms: </label>Biology G-Biology 
<br/><br/><label>Dewey Class. No.: </label>574.52  / As 83 En