\begin{table}%t1
%\centering
\par
\caption{Results obtained from least-square fitting of $\log\epsilon_{\rm nor}(X)$
vs. [Fe/H] of normal stars: $\log\epsilon_{\rm nor}(X)$~=~$A$[Fe/H]~+~$B$; 
"cov'' is
the covariance between~$A$ and~$B$; "d.o.f.'' is the number of degrees of freedom.\label{ajustes}}
{\small
\begin{tabular}{rcccrr}
\hline\hline
\noalign{\smallskip}
$X$ & $A$ & $B$ & $\chi^2_{\rm red}$   & cov (10$^{-4}$) & d.o.f.\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
Sr & 1.013 $\pm$ 0.024 & 2.908 $\pm$ 0.021 & 1.197 &  4.18 &  82 \\
Y  & 1.112 $\pm$ 0.016 & 2.239 $\pm$ 0.013 & 1.002 &  1.58 & 160 \\
Zr & 0.939 $\pm$ 0.019 & 2.625 $\pm$ 0.015 & 1.385 &  2.06 &  66 \\
Mo & 0.970 $\pm$ 0.212 & 1.895 $\pm$ 0.342 & 1.472 & 715.2 &   7 \\
Ba & 0.992 $\pm$ 0.014 & 2.095 $\pm$ 0.011 & 1.978 &  1.07 & 214 \\
La & 1.190 $\pm$ 0.031 & 1.377 $\pm$ 0.039 & 4.891 & 10.91 &  47 \\
Ce & 1.009 $\pm$ 0.047 & 1.500 $\pm$ 0.047 & 0.923 & 20.20 &  34 \\
Pr & 0.867 $\pm$ 0.048 & 0.748 $\pm$ 0.050 & 1.180 & 19.99 &  13 \\
Nd & 0.950 $\pm$ 0.019 & 1.460 $\pm$ 0.017 & 1.635 &  2.46 &  99 \\
Sm & 0.811 $\pm$ 0.045 & 0.951 $\pm$ 0.045 & 1.407 & 18.76 &  34 \\
Eu & 0.783 $\pm$ 0.019 & 0.581 $\pm$ 0.015 & 1.263 &  2.20 & 165 \\
Dy & 0.840 $\pm$ 0.031 & 1.080 $\pm$ 0.044 & 4.312 & 11.70 &  22 \\
\hline
\end{tabular}                                
}                                            
\end{table}