Ray, P.K.S.  . <br/><br/>
Educational technology: technology of instructional design /  
by P.K.S. Ray. 
 - New Delhi :   Dominant Publishers and Distributors ,   2012 
 - 462 p. :  
<br/><br/><label>ISBN: </label>978-93-80642-22-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Learning technology
<br/><br/><label>Dewey Class. No.: </label>T:(F)  / Q2.2