Census of India,1971 <br/><br/>
Social cultural tables. V 9,  Kerala. Pt. 2C2 (C-1 to C-VI and F-1 to F-V) 

 - Kerala  Govt. Press           1971 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.212sN71, L1.9-2C2