Educational technology research and development 

 - Washington :  Association for Educational Communications & Technology,  1953- 
 - v. ;  25 cm. 
<br/><br/> UKM: v.1-39 (1953-1991) 
<br/><br/><label>ISSN: </label>1042-1629 
 = Educational technology research and development Educational technology research and development 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mass media--Periodicals