Bergmann, Ludwig, 1898-1959 Ultrasonics and their scientific and technical applications / by Dr. Ludwig Bergmann ; Translated by Dr. H. Stafford Hatfield from the German work Ultraschall.

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Bergmann, Ludwig, 1898-1959

Ultrasonics and their scientific and technical applications / by Dr. Ludwig Bergmann ; Translated by Dr. H. Stafford Hatfield from the German work Ultraschall.

Sound-waves.

Sound -- Measurement.

1945.

Hatfield, Henry Stafford, tr.

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