Hass <br/><br/>
Preparation and use of audio visual aids / 
by Hass and Packer 
 -  Prentice hall, 
 - 381p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>370  / HAS.P