Gerlach, Vernon S.; Ely, Donald P. &  Melnick, Rob <br/><br/>
Teaching & media : a systematic approach 

 - 2nd 
 - Prentice Hall, New Jersey  1980 
 - x,420 
<br/><br/><label>ISBN: </label>0-13-891358-7 
<br/><br/><label>Dewey Class. No.: </label>371.33 Ger/Ely