Mangal, S.K <br/><br/>
Essentials of educational technology / 
by S.K.Mangal 
 - New Delhi :  Phi Learning Private Limited ,  2009 . 
 - 812 p.  Paper Back 
<br/><br/><label>ISBN: </label>9788120337237 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>Systems of education<br/>Educational technology
<br/><br/><label>Dewey Class. No.: </label>371.4  / MAN-E