Rao, Usha <br/><br/>
Educational technology / 
Rao, Usha. 
 - Guwahati:  Himalaya Publishing House,  2014. 
 - 350p.; 24cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9789350244890 
<br/><br/><label>Dewey Class. No.: </label>371.33 RAO