Wittich, Walter Arno <br/><br/>
Audiovisual materials : their nature and use  their nature and use 

 - xxvi, 500 páginas :   il. ; lam. ; fot. ;   24 cm. 
 - Exploration. Serie in Education .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Material Audiovisual<br/>Enseñanza Audiovisual
<br/><br/><label>Subjects--Index Terms: </label>Multimedios