Teaching and media;  a systematic approach 
[by] Vernon S. Gerlach [and] Donald P. Ely.  
 - Englewood Cliffs, N.J.,  Prentice-Hall  [1971]  
 - xiii, 392 p  illus  24 cm. 
<br/><br/>Includes bibliographies.  
<br/><br/><label>ISBN: </label>0138913331 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education.<br/>Teaching--Aids and devices.
<br/><br/><label>LC Class. No.: </label>LB1043  / .G318