Slide Rule for Computing Radioactivity Decay Factors Defactor Calculator Herson For Sale

Slide Rule for Computing Radioactivity Decay Factors Defactor Calculator Herson
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Slide Rule for Computing Radioactivity Decay Factors Defactor Calculator Herson:
$40.00

Slide Rule for Computing Radioactivity Decay Factors Defactor Calculator Herson.
A specialized slide rule for atomic work by JL Herson of Washington, DC, patent pending.


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