Mangal, S.K. <br/><br/>
Educational technology 

 - New Delhi  Arya Book Depot  2015 
 - 249p. 
<br/><br/> 702 
<br/><br/><label>ISBN: </label>9788170639053  200 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>371.335 MAN-E