Mangal,S K &. Mangal,Uma. <br/><br/>
Essentials of Educational Technology  Textual Documents 
S K Mangal & Uma Mangal 
 - First-2009. 
 - New Delhi:  PHI Learning. 
 - 812pg:  30cm. 
<br/><br/><label>ISBN: </label>9788120337237 
<br/><br/><label>Subjects--Index Terms: </label>Education-Educational Technology MS-Edn Deptt-Edn PG-Edn G-Edn 
<br/><br/><label>Dewey Class. No.: </label>371.1