Rao, V.K. and Reddy, R.S. <br/><br/>
The nature of educational technology 

 - New Delhi  Commonwealth publishers  1992 
 - 340p. 
<br/><br/><label>ISBN: </label>8171692281  375 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>370  / RAO