Fig. 9
Abundance ratios of the idr2/3 old and intermediate-age open clusters located in the inner disc as a function of the atomic number. In black are the abundance ratios of Be 81, in yellow NGC 6705, in green NGC 4815, and in red Tr 20. The dashed line marks the solar abundance, and the shaded area the 1σ regions with σ = 0.1 dex.
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