Bergmann, Ludwig <br/><br/>
Ultrasonics and their scientific and technical applications 
Ludwig Bergmann                                            
 - New York  John Wiley & Sons  1938 
 - viii, 264p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Acoustics<br/>Astronomy and astrophysics thesaurus<br/>Ultrasonics
<br/><br/><label>Universal Decimal Class. No.: </label>534.8  / BER