Census of India,1971 <br/><br/>
Monography series 7 changing population of Kerala. V 9, .Kerala  Pt. 11. 

 -  1971 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.212sN61, K1.9-11(7)