The Encyclopaedia of educational media communications and technology / 
[edited by] Derick Unwin and Ray McAleese. 
 - London :  Macmillan Press,  1978. 
 - xviii, 800 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0313209219 0333185501 
<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  / ENC 1978