Wittich, Walter Arno  <br/><br/>
Audiovisual materials 

 - 1 ed. 
 - New York :   Harper and Row,   c1953, 1967 
 - xvi, 554 p 
<br/><br/> Los materiales audio-visuales 
<br/><br/><label>Subjects--Topical Terms: </label><br/>educación visual
<br/><br/><label>Dewey Class. No.: </label>268.6350 W78