Thakur, K.R <br/><br/>
Educational development and technology / 
K. R Thakur 
 - INDIA :  Saurabh publishing house  2010 
<br/><br/><label>ISBN: </label>9788189005610 
<br/><br/><label>LC Class. No.: </label>LB 2805   / .T42 2010