Census of India, 1961 <br/><br/>
Indian working force ( Its growth and changing composition ). Monograph no. 11 
Census of India, 1961 
 - India  Govt. Press           1961 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.2sN61, K1.1-11