Ed. By Dr. S K ingh, B K Sinha and Kalpataru Biswal <br/><br/>
OPSC General Studies  Paper-1 
Singh, Sushil Kumar 
 - New Delhi  Salween Publisher  2023 
 - 800 p. 
<br/><br/><label>ISBN: </label>9789384409777 
<br/><br/><label>Dewey Class. No.: </label>000  / SIN