Census of India, 1961 <br/><br/>
General economic tables.Madras. V. 9, Part 2 B 1 

 - Madras  Govt. Press           1961 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.211sN61, K1.9-2B1