Census of India, 1981 <br/><br/>
Age tables based on 5 per cent sample data. India. V. 1 

 - India  Govt. Press           1981 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.2sN81, M1.1-5