Wittich, Walter A.  1910- <br/><br/>
Audio-visual materials :  their nature and use / 
by Walter Arno Wittich and Charles Francis Schuller 
 - New York :  Harpar and Brothers Pub.,  1953 
 - 564 p. ;  25 cm. 
 - Exploration series in education .
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education<br/>Education