Census 1951    Language handbook Travancore- Cochin, comp. by U. Sivaraman Nair 

 -  1951 
<br/><br/><label>Standard No.: </label>69880 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SOCIOLOGY
<br/><br/><label>Dewey Class. No.: </label>Y1:5s2:N510P, J513