Mangal,S.K. <br/><br/>
Essentials of Educational Technology 
/by S.K. Mangal 
 - Delhi:  PHI Learning Private Limited;  2026. 
 - xxvi,812p. 
<br/><br/><label>ISBN: </label>978-81-203-3723-7 
<br/><br/><label>Dewey Class. No.: </label>371.33  / MAN/E