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Bell Rings down a Century
A. C. Monahan
The Science News-Letter
Vol. 51, No. 9 (Mar. 1, 1947), pp. 138-139
Published by: Society for Science & the Public
Stable URL: http://www.jstor.org/stable/3923620
Page Count: 2
You can always find the topics here!Topics: Telephones, Bells, Vibration, Telegraph, Radiotelephones, Patents, Sound waves, Electric current
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