Karthikeyan, M <br/><br/>
Internal security for civil services main examination 
M.Karthikeyan 
 - 2nd ed 
 - Chennai  [publisher not identified]  2017 
 - xxvi,A10.17p.;22cm 
<br/><br/><label>ISBN: </label>9789332587359 
<br/><br/><label>Dewey Class. No.: </label>032.02 KAR