The Encyclopaedia of educational media communications and technology / 
edited by Derick Unwin [and] Ray McAleese 
 - London :  Macmillan Press,  c1978 
 - xviii, 800 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>0333185501 :  PND 25.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual materials--Dictionaries<br/>Educational technology--Dictionaries
<br/><br/><label>Dewey Class. No.: </label>371.3078