Davidson, Raymond L. <br/><br/>
Audiovisual machines / 
by Raymond L. Davidson 
 - 2nd ed. 
 - Scranton, Pa. :  International Textbook,  1969 
 - xix, 266 p. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>0700222057 
<br/><br/><label>LCCN: </label>69-016622 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual equipment