Wittich, Walter Arno,  1910- <br/><br/>
Audiovisual materials / 
Walter Arno Wittich, Charles Francis Schuller 
 - 4th ed. 
 - New York :  Harper & Row,  1967 
 - xvi, 554 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>LCCN: </label>67-013282 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education