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Difficulties in Telling QSOs from Blue Stars. Nature 239, 367 (1972). https://doi.org/10.1038/239367b0
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DOI: https://doi.org/10.1038/239367b0
Nature volume 239, page 367 (1972)
Difficulties in Telling QSOs from Blue Stars. Nature 239, 367 (1972). https://doi.org/10.1038/239367b0
Issue Date:
DOI: https://doi.org/10.1038/239367b0