Census of India, 1961 <br/><br/>
Language monographs inquiries into the spoken languages of India ( From early times to Census of India 1901. India. V.1, Part 11 C (1) 

 - India  Govt. Press           1961 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.2sN61, K1.1-11C(1)