Wittich, Walter Arno. <br/><br/>
Audiovisual materials :  their nature and use / 
by Walter Arno Wittich and Charles Francis Schuller. 
 - 3rd ed. 
 - New York :  Harper & Brothers,  1962. 
 - xxvi, 500 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual materials.<br/>Audio-visual education.
<br/><br/><label>Dewey Class. No.: </label>371.33