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Takeda, Yoichi; et al. (October 2018), "Photospheric carbon, nitrogen, and oxygen abundances of A-type main-sequence stars*", Publications of the Astronomical Society of Japan, 70 (5): 91, arXiv:1807.06265, Bibcode:2018PASJ...70...91T, doi:10.1093/pasj/psy091, 91.
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