Dale, Edgar. <br/><br/>
Audio-visual methods in teaching / 
Edgar Dale. 
 - Rev. ed. 
 - New York :  The Dryden Press,  1954 
 - ix, 534 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education.<br/>Education-- Audio-visual aids.
<br/><br/><label>Dewey Class. No.: </label>371.33