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Fig. 6


12C/16O versus 12C/13C ratios for several classes of stars and for the Feh-Duf star. Barium giants (red open squares); disk carbon stars, (green starry points); GK giants, (upside-down “Y”); CH stars, (blue open polygons); subgiant CH stars, (red plus sign) and Feh-Duf star (filled black circle).

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