Fig. 2
Comparison between our N (upper panel), O (middle panel), and Fe (lower panel) abundance estimates and recent literature values obtained by optical studies. Circles, triangles, diamonds, squares, and star symbols represent values obtained by Nieva & Przybilla (2012), Venn et al. (2002), Valdes et al. (2004), Searle et al. (2008), and Morel et al. (2006, 2008), respectively.
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