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Counting alpha particles was tedious and time-consuming work, until Hans Geiger came up with a device that did the job automatically.
The Geiger Counter (Physics of Technology Series) : Homer C. Wilkins : Free Download, Borrow, and Streaming : Internet Archive
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The Geiger Counter (Physics of Technology Series) : Homer C. Wilkins : Free Download, Borrow, and Streaming : Internet Archive
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