Table 3: Mean values for the equivalent line widths for the stars in common with Ramírez et al. (1997).
this work Ramírez et al. (1997)

Na I $2.05 \pm 0.62$ $2.39 \pm 0.54$

Ca I $1.64 \pm 0.70$ $2.93 \pm 0.82$

**Table 3:** Mean values for the equivalent line widths for the stars in common with Ramírez et al. (1997).
	this work	Ramírez et al. (1997)
Na I	$2.05 \pm 0.62$	$2.39 \pm 0.54$
Ca I	$1.64 \pm 0.70$	$2.93 \pm 0.82$

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