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Union Observatory, Johannesburg. Nature 181, 533–534 (1958). https://doi.org/10.1038/181533b0
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DOI: https://doi.org/10.1038/181533b0
Nature volume 181, pages 533–534 (1958)
Union Observatory, Johannesburg. Nature 181, 533–534 (1958). https://doi.org/10.1038/181533b0
Issue Date:
DOI: https://doi.org/10.1038/181533b0