00509nam a2200157Ia 4500003000900000008004100009040001600050080001500066100002100081245012400102260003800226300001600264650001400280650004100294650001600335IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a534.8bBER  aBergmann, Ludwig 0aUltrasonics and their scientific and technical applicationscLudwig Bergmann                                             aNew YorkbJohn Wiley & Sonsc1938  aviii, 264p.  aAcoustics  aAstronomy and astrophysics thesaurus  aUltrasonics