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Up or Down ?. Nature 225, 410 (1970). https://doi.org/10.1038/225410a0
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DOI: https://doi.org/10.1038/225410a0
Nature volume 225, page 410 (1970)
Up or Down ?. Nature 225, 410 (1970). https://doi.org/10.1038/225410a0
Issue Date:
DOI: https://doi.org/10.1038/225410a0