Sampath, K. [et.al.] <br/><br/>
Introduction to educational technology / 

 - 3rd ed. 
 - New Delhi :  Starling Pub.,  1990. 
 - xii, 348 p., 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education.
<br/><br/><label>Dewey Class. No.: </label>370