Gerlach, Vernon S  <br/><br/>
Teaching and Media : a systematic approach  
/by Vernon S Gerlach and Donald P Ely  
 - 2nd edition  
 - New Jersey  prentice hall   1980 
 - x, 420p. 
<br/><br/><label>ISBN: </label>0138913587 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual  education --Teaching 
<br/><br/><label>Dewey Class. No.: </label>371.3  / GER/T