Educational design research / 
edited by Jan van den Akker ... [et al.] 
 -  Routledge  2006 
<br/><br/>15864 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Instructional systems - Design - Research
<br/><br/><label>LC Class. No.: </label>LB1028.38  / Edu