Cable, Ralph <br/><br/>
Audio-visual handbook 
Ralph Cable 
 - 4th ed. 
 - London  University of London Press  1972 
 - 118 p. : ill. ; 23 cm. 
<br/><br/><label>ISBN: </label>0340168455 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio--visual education--Handbooks, manuals, etc.