Guide to official statistics 

 - 3rd 
 - Delhi  Manager Of Publication India         1999 
 -  Ed2 1985 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social Sciences
<br/><br/><label>Dewey Class. No.: </label>Sigma.2s, M9/GD