A report on 16mm sound film projectors. 

 - London :    N. C. A-V. A. E. ,    1970. 
 - 30 p. :    ill. ;    20 cm. 
 - Experimental Development Unit ;    report 7. .
<br/><br/><label>Subjects--Topical Terms: </label><br/> Audio-visual materials.
<br/><br/><label>Dewey Class. No.: </label>370