Cochran <br/><br/>
Manual of audio visual techniques / 
 A manual of audio visual techniques 
by Cochran 
 -  Prentice hall,  1966. 
 - 528p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>370  / COC.M