Wittich, Walter <br/><br/>
Instructional technology  its nature and use 

 - 5ed 
 - Estados Unidos :  Harper & Row publishers,  1973. 
 - 737p 
 - Exploration series in education .
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Tecnología
<br/><br/><label>Dewey Class. No.: </label>600