Butler, H. C. <br/><br/>
Educational Foundation  for Visual Aids / 
H. C. Butler. 
 - London :  National Committee for Audio-Visual Aids in Education,  1966. 
 - 40 p. :  ill. ;  21 cm. 
 - Experimental development unit report ;  No. 5. .
 - Experimental development unit report ;  No. 5. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Moving--pictures in education.