Mangal , S.K. <br/><br/>
Essential of Educational Technology 
/ by S.K. Mangal & Uma Mangal 
 - Delhi,  PHI Learning Pvt. Ltd;  2026. 
 - xxiv, 812p. 
<br/><br/><label>ISBN: </label>9788120337237 
<br/><br/><label>Dewey Class. No.: </label>371.3354  / MAN/E