Citations
John Pope 'checking the performance of one of the new quartz crystal clocks', 1945 - 1946, GBR/0180/RGO 220/2/2/1/2. Cambridge University Library. |
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John Pope 'checking the performance of one of the new quartz crystal clocks', 1945 - 1946, GBR/0180/RGO 220/2/2/1/2. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/860824 Accessed December 01, 2024. |