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Yokohama Mathematical Journal . Nature 173, 152 (1954). https://doi.org/10.1038/173152d0
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DOI: https://doi.org/10.1038/173152d0
Nature volume 173, page 152 (1954)
Yokohama Mathematical Journal . Nature 173, 152 (1954). https://doi.org/10.1038/173152d0
Issue Date:
DOI: https://doi.org/10.1038/173152d0