Census of India,1971 <br/><br/>
Social and cultural tables. V 9,  Kerala  Pt. 2C1 (Tables C-7 and C-8) 

 - Kerala  Govt. Press           1971 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.212sN71, L1.9-2C1