Nayar, K. R. <br/><br/>
Ecology and Health:  A Systems Approach 
/ by K. R. Nayar 
 - New Delhi;  APH Publishing Corporation:  1998. 
 - viii, 210p. 
<br/><br/><label>ISBN: </label>8176480193 
<br/><br/><label>Dewey Class. No.: </label>577  / NAY/E