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Royal Society: Units. Nature 221, 402 (1969). https://doi.org/10.1038/221402b0
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DOI: https://doi.org/10.1038/221402b0
Nature volume 221, page 402 (1969)
Royal Society: Units. Nature 221, 402 (1969). https://doi.org/10.1038/221402b0
Issue Date:
DOI: https://doi.org/10.1038/221402b0