Abstract
SINCE the atomic standard of frequency was put into operation1, a number of comments have been published2–10 concerning the possibility of using the standard to define the unit of time; but two queries initially raised by Dr. G. M. Clemence3 have not yet been fully answered.
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References
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ESSEN, L. The Units of Time and Length. Nature 180, 137–138 (1957). https://doi.org/10.1038/180137a0
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DOI: https://doi.org/10.1038/180137a0
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