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Post Office Engineering Research Station. Nature 168, 1022–1023 (1951). https://doi.org/10.1038/1681022a0
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DOI: https://doi.org/10.1038/1681022a0
Nature volume 168, pages 1022–1023 (1951)
Post Office Engineering Research Station. Nature 168, 1022–1023 (1951). https://doi.org/10.1038/1681022a0
Issue Date:
DOI: https://doi.org/10.1038/1681022a0