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Astrophysics: Brightness Changes in Quasars. Nature 219, 894 (1968). https://doi.org/10.1038/219894a0
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DOI: https://doi.org/10.1038/219894a0
Nature volume 219, page 894 (1968)
Astrophysics: Brightness Changes in Quasars. Nature 219, 894 (1968). https://doi.org/10.1038/219894a0
Issue Date:
DOI: https://doi.org/10.1038/219894a0