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European Space Marks Time. Nature 218, 619 (1968). https://doi.org/10.1038/218619a0
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DOI: https://doi.org/10.1038/218619a0
Nature volume 218, page 619 (1968)
European Space Marks Time. Nature 218, 619 (1968). https://doi.org/10.1038/218619a0
Issue Date:
DOI: https://doi.org/10.1038/218619a0