Census of India, 1981 <br/><br/>
General economic tables. Andhra Pradesh. V. 2, Pt. 3 A & B (IV) 

 - Andhra Pradesh   Govt. Press          1981 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.216sN81, M1.2-3A&B(IV)