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Postal Chaos. Nature 219, 666–667 (1968). https://doi.org/10.1038/219666b0
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DOI: https://doi.org/10.1038/219666b0
Nature volume 219, pages 666–667 (1968)
Postal Chaos. Nature 219, 666–667 (1968). https://doi.org/10.1038/219666b0
Issue Date:
DOI: https://doi.org/10.1038/219666b0