Census of India 1961 <br/><br/>
Kerala: general economic tables 

 - Delhi  The Manager of Publications  1965 
 - 193+p. 
 - Census of India 1961. Volume VII, Kerala. Part II-B (i) .
<br/><br/> Tables B-1 to B-IV 
<br/><br/><label>Dewey Class. No.: </label>A81x54 In2/61/7/PT2/B/2