Census of India 1971 <br/><br/>
Kerala: special survey reports on selected towns, Valapattanam 

 - Delhi  The Controller of Publications  1986 
 - 100+p. 
 - Census of India 1971. Series-9, Kerala. Part VI-B .
<br/><br/><label>Dewey Class. No.: </label>A81x54 In2/71/9/PT6B/V