Clark, John A. <br/><br/>
Hearing and seeing / 
[by] John A. Clark [and others]. 
 - [London] :  Longmans [Green,  1962] 
 - Science on the march. unit 7  Science on the march. unit 7 .
<br/><br/> First published in 1956. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sound.<br/>Light.