Wittich, Walter Arno  1910, <br/><br/>
Instructional technology its nature and use / 
Walter a. wittich, Charles f. schuller 
 - 6 
 - 331 páginas 
<br/><br/><label>ISBN: </label>0060471697 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Enseñanza audiovisual
<br/><br/><label>LC Class. No.: </label>LB1043  / W57 1979