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Portion of an XMM-Newton reflection-grating spectrum of the disk of Mars. M Santos-Lleo et al. Nature 462 , 997-1004 (2009) doi:10.1038/nature08 690.
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Portion of an XMM-Newton reflection-grating spectrum of the disk of Mars. M Santos-Lleo et al. Nature462, 997-1004 (2009) doi:10.1038/nature08690