Bergmann, Ludwig. <br/><br/>
Ultrasonics and their scientific and technical applications 

 - New York :   Wiley,   1938. 
 - p. 264 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ULTRASONICO<br/>ENSAYO DE MATERIALES<br/>MATERIALES
<br/><br/><label>Universal Decimal Class. No.: </label>620.179.16