Heinich, Robert. <br/><br/>
Instructional media, and the new technologies of instruction / 
Robert Heinich, Michael Molenda, James D. Russell. 
 - New York :  John Wiley & Sons,  1982. 
 - 375 p. :  ill. ;  28 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0471368938 
<br/><br/><label>LCCN: </label>81-14630 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational technology.