Ely, Donald P. and gerlach, Vernon S. <br/><br/>
Teaching and media  a systematic approach 

 - New jersey  Prentice Hall  1971 
 - xiii,392p. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>Teaching
<br/><br/><label>Dewey Class. No.: </label>371.102  / ELY