Wittich, Walter Arno  <br/><br/>
Audio visual materials their nature and use / 
by Walter Arno Wittich and Charles Francis Schuller 
 - New York :  Harper & Row,   1968. 
 - 554p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio visual materials
<br/><br/><label>Dewey Class. No.: </label>371.33  / WIT.A