Haas, Kenneth B.  1898- <br/><br/>
Preparation and use of audio-visual aids / 
Kenneth B. Haas, Harry Q. Packer ; drawings by Bert Paul Kuhn. 
 - 3rd ed. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1955. 
 - 381 p. :  ill. ;  24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education.