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Acta Physica. Nature 209, 860 (1966). https://doi.org/10.1038/209860a0
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DOI: https://doi.org/10.1038/209860a0
Nature volume 209, page 860 (1966)
Acta Physica. Nature 209, 860 (1966). https://doi.org/10.1038/209860a0
Issue Date:
DOI: https://doi.org/10.1038/209860a0