Gayen A K (et. al) <br/><br/>
Measurement of achievements in history, civics and economics: A statistical study on the effectiveness of external examinations 
N C E R T 
 - xviii,170p. 
<br/><br/><br/>Report No. 5th of the research project on examinations Indian Institute of Technology, Kharagpur 
<br/><br/><label>Source: </label>Books to be hide in OPAC