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The Mathematical Association. Nature 179, 347 (1957). https://doi.org/10.1038/179347a0
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DOI: https://doi.org/10.1038/179347a0
Nature volume 179, page 347 (1957)
The Mathematical Association. Nature 179, 347 (1957). https://doi.org/10.1038/179347a0
Issue Date:
DOI: https://doi.org/10.1038/179347a0