Aggarwal, J.C. <br/><br/>
Essentials of Educational Technology   innovations in teaching -learning   

 - 2nd 
 - New Delhi  Vikas Publishing  1995 
 - xii, 504 p.  Illustration  20 cm 
<br/><br/> Educational Technology 
<br/><br/><label>ISBN: </label>9788125922933 
<br/><br/><label>Universal Decimal Class. No.: </label>37.014.64