Citations
'Units & standards of measurement employed at the National Physical Laboratory: II: Light: photometry, colorimetry and radiometry', 1952 - 1956, GBR/3296/Maps/CCSA.IM_512_9, IM_512_9. Cambridge University Library. |
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'Units & standards of measurement employed at the National Physical Laboratory: II: Light: photometry, colorimetry and radiometry', 1952 - 1956, GBR/3296/Maps/CCSA.IM_512_9, IM_512_9. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/archival_objects/240136 Accessed May 14, 2025. |