Heinich, Robert. <br/><br/>
Instructional media and the new technologies of instruction / 
by Robert Heinich, Michael Molenda, James D. Russell 
 - 4th ed. 
 - New York :  MacMillan,  1993. 
 - 463 p. :  ill. ;  29 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>002353060X 
<br/><br/><label>LCCN: </label>92-28702 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational technology.<br/>Audio-visual education.