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School Mathematics. Nature 183, 1092 (1959). https://doi.org/10.1038/1831092b0
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DOI: https://doi.org/10.1038/1831092b0
Nature volume 183, page 1092 (1959)
School Mathematics. Nature 183, 1092 (1959). https://doi.org/10.1038/1831092b0
Issue Date:
DOI: https://doi.org/10.1038/1831092b0