Gerlach, Vernon S. <br/><br/>
Teaching and media :  a systematic approach / 
by Vernon S. Gerlach. 
 - Englewood Cliffs :  Prentice-Hall,  c1971. 
 - xiii, 392 p. :  ill. 
<br/><br/><label>ISBN: </label>138913331 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Media programs (Education)<br/>Teaching--Aids and devices.
<br/><br/><label>LC Class. No.: </label>LB1044.88  / .G47