File:Photographies of Koga's research group and the main building of Tokyo Institute of Technology .pdf
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Photographies_of_Koga's_research_group_and_the_main_building_of_Tokyo_Institute_of_Technology_.pdf (file size: 147 KB, MIME type: application/pdf)
Invention of Temperature-Insensitive Quartz Oscillation Plate Enabling Highly Stable Communications and Clocks, 1933: Photographies of Koga's research group and the main building of Tokyo Institue of Technology.
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current | 01:16, 11 January 2016 | (147 KB) | R1CUTQUARTZ (talk | contribs) | Invention of Temperature-Insensitive Quartz Oscillation Plate Enabling Highly Stable Communications and Clocks, 1933: Photographies of Koga'research group and the main building of Tokyo Institue of Technology. |
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