Census of India 1981 <br/><br/>
Kerala: general economic tables 

 - Delhi  The Controllor of Publications  1987 
 - 989+p. 
 - Census of India 1981. Series-10, Kerala. Part- III A & B (i) .
<br/><br/><label>Dewey Class. No.: </label>A81x54 In2/81/10/Pt3A&B/1