Allen, Sylvia. <br/><br/>
A manager's guide to audiovisuals  / 
Sylvia Allen. 
 - New York :  McGraw-Hill,  c1979. 
 - ix, 182 p. :  ill. 
<br/><br/><label>ISBN: </label>0070010935 
<br/><br/><label>LCCN: </label>55051587  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication in management--Audio-visual aids.<br/>Management--Audio-visual aids.