Census of India, 1961 <br/><br/>
Age tables. India. V. 1 

 - India  Govt. Press           1961 
<br/><br/> Paper no. 2 of 1963 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.2sN61, K1.1-2