Acoustics -- 19th century.;Acoustics -- 20th century.;Sound -- 19th century.;Sound -- 20th century
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Acoustics -- 19th century.;Acoustics -- 20th century.;Sound -- 19th century.;Sound -- 20th century
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Acoustics -- 19th century.;Acoustics -- 20th century.;Sound -- 19th century.;Sound -- 20th century
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