Yadav R S <br/><br/>
Advanced educational technology 

 - Allahabad, India  Horizon Publishers  1997 
 - xi,398p 
<br/><br/><label>ISBN: </label>81-7251-015-2 
<br/><br/><label>Source: </label>TextBook 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational Technology