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Union Astronomer at Johannesburg. Nature 180, 582 (1957). https://doi.org/10.1038/180582a0
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DOI: https://doi.org/10.1038/180582a0
Nature volume 180, page 582 (1957)
Union Astronomer at Johannesburg. Nature 180, 582 (1957). https://doi.org/10.1038/180582a0
Issue Date:
DOI: https://doi.org/10.1038/180582a0