Census of India 1951 <br/><br/>
Uttar Pradesh: economic classification by age groups 

 - New Delhi  The Deputy Registrar General  1956 
 - 350+p. 
 - Census of India 1951. Uttar Pradesh. Paper No. 3 of 1955 .
<br/><br/><label>Dewey Class. No.: </label>A81x54 In2/51/56/3