Visual & aural aids: a report 
by Scottish Eduaction Departement 
 - Edinburgh  Her Majesty's Stationery Office  1950 
 - 54p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education
<br/><br/><label>Dewey Class. No.: </label>P141x41 Un3