Sankara Menon, T K <br/><br/>
Census of India 1931 Vol 21 Cochin / 
by T K Sankara Menon 
 - Ernakulam :  Superintendent Cochin Govt press,  1933. 
<br/><br/> Vol 21<br/>Part 1 : report<br/>Part 2 : A & B tables