Rao, Usha  . <br/><br/>
Educational technology /  
by Usha Rao. 
 - 4th Rev ed /  
 - Mumbai :   Himalayan Publishing house ,   2001 
 - 277p ;  
<br/><br/><label>ISBN: </label>81-7866-601-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education- technology
<br/><br/><label>Dewey Class. No.: </label>T:(F)  / P1