Gerlach, Vernon S. <br/><br/>
Teaching and media  a systematic approach 

 - Englewood Cliffs  Prentice Hall  1971 
 -  23 . 3 cms 
<br/><br/><label>ISBN: </label>13 891333 1 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>371. 3