Gerlach, Vernon S. <br/><br/>
Teaching and media : a systematic approach 
/ by Vernon S. Gerlach and Donald P. Ely 
 - Englewood Cliffs :  Prentice-Hall,  1971 
 - xiii, 392p.; 22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>School organization and management <br/>Methods-Study and teaching
<br/><br/><label>Dewey Class. No.: </label>371.3  / GER-TE