Wittich W A <br/><br/>
Audio visual materials their nature and use 

 -  1953 
<br/><br/><label>Standard No.: </label>86,686 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EDUCATION
<br/><br/><label>Dewey Class. No.: </label>T:31, J3-;1