S K Mangal, <br/><br/>
Essentials of educational technology 
By S K Mangal and Uma Mangal 
 - 9th rep. 
 - Delhi:  Phi learning private limited,  2018. 
 - 812p. 
<br/><br/><label>ISBN: </label>9788120337237 
<br/><br/><label>Subjects--Index Terms: </label>Schools & their activities special education 
<br/><br/><label>Dewey Class. No.: </label>371.33