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Detection of the Na I doublet and the Wing–Ford band. PGV Dokkum & C Conroy Nature 000 , 1-3 (2010) doi:10.1038/nature09578.
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Detection of the Na I doublet and the Wing–Ford band. PGV Dokkum & C Conroy Nature000, 1-3 (2010) doi:10.1038/nature09578