Nayar, K.R <br/><br/>
Ecology and health  a systems approach 

 - New Delhi  APH publishing corporation  1998 
 - 210p.  HB  22cm. 
<br/><br/> includes bibliographical references and index 
<br/><br/><label>ISBN: </label>8176480193 
<br/><br/><label>Dewey Class. No.: </label>577  / NAY