Walter,M. <br/><br/>
Encyclopaedia of population and development .-81-7625-327-8 

 - Sarup & Sons, New Delhi  2002 
 - 335 
<br/><br/><label>ISBN: </label>81-7625-327-8 
<br/><br/><label>Dewey Class. No.: </label>R 301.3203 Wal