M G Chitkara <br/><br/>
Encyclopaedia of Ecology, Environment and Pollution : vol.XV : a compendium of environment terms 

 - APH, New Delhi  1998 
 - xii,235p 
<br/><br/><label>ISBN: </label>81-7024-895-7 
<br/><br/><label>Dewey Class. No.: </label>301.303 EEEP