Thakur, K.R <br/><br/>
Educational development & technology 

 - New Delhi:  saurabh,  2010. 
 - 258 P.:  ill. 
<br/><br/> include index 
<br/><br/><label>ISBN: </label>9788189005610 
<br/><br/><label>Subjects--Personal Names: </label><br/>technology
<br/><br/><label>LC Class. No.: </label>LB1028.3.T44 2010