Census of India, 1961 <br/><br/>
Village survey monographs. Sivangar village. Andhra Pradesh. V. 2, Part 6, No. 35 

 - Andhra Pradesh   Govt. Press          1961 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.216sN61, K1.2-6(35)