Wittich, Walter A <br/><br/>
Instructional technology :  its nature and use / 
Walter A. Wittich, Charles F. Schuller. 
 - 6th ed. 
 - New York :  Harper & Row,  c1979. 
 - xx, 331 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0060471697 (Hb.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education.
<br/><br/><label>LC Class. No.: </label>LB1043  / .W57 1979