Efron, Alexander  1897- <br/><br/>
Sound / 
Alexander Efron 
 - New York :  J. F. Rider,  1957 
 - 72 p. :  ill. ;  22 cm. 
 - Basic science series .
 - Basic science series .
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sound.
<br/><br/><label>Dewey Class. No.: </label>534  / ERS 1957