Thorpe, Edgar <br/><br/>
General Studies Manual 2009 : For the UPSC Civil Services Preliminary Examination 

 - 5th Ed. 
 -  Tata McGraw-Hill Publishing Company Limited  2009 
 - 512 
<br/><br/><label>ISBN: </label>9788131721339 
<br/><br/><label>Dewey Class. No.: </label>351.6 THO/G