Govt. of Andhra Pradesh <br/><br/>
Statistical abstract Andhra pradesh 

 - Hyderbad  Directorate of economics and statistics  2007 
 - vp. 
<br/><br/><label>Standard No.: </label>121617 
<br/><br/><label>Subjects--Index Terms: </label>MATHEMATCIS 
<br/><br/><label>Dewey Class. No.: </label>315.484  / STA