Wragg, E.C. <br/><br/>
Explaining 
Series editor Clive Carre 
 - London  Routledge  1993 
 - viii,51p 
<br/><br/> Includes bibliography 
<br/><br/><br/>eng 
<br/><br/><label>ISBN: </label>0-415-08387-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Instructional systems-Design-Case studies
<br/><br/><label>Dewey Class. No.: </label>371.3  / WRE