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>0333185501 :  £25.00 
<br/><br/><label>LCCN: </label>79304554  
<br/><br/><label>Nat. Bib. No.: </label>GB*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual materials--Dictionaries.<br/>Educational technology--Dictionaries.
<br/><br/><label>LC Class. No.: </label>LB1042.5  / .E52 1978 
<br/><br/><label>Dewey Class. No.: </label>371.307