\begin{table}%t14
%\centering
\par
\caption{Average value of $A$(Li)$_{\rm NLTE}$ and average deviation 
for [Fe/H]~$\leq$~--1.5: 
When all the stars are considered regardless of their possible 
duplicity or variability (Col.~a), when all the suspected and confirmed 
binaries are omitted (Col.~b), and when only the confirmed binaries are 
excluded (Col.~c). In cases (b) and (c) the stars reported as variable 
in SIMBAD are not considered.  The first and second lines contain the values 
for the {\it clean} and the {\it complete} samples respectively.\label{tab14}}
\begin{tabular}{cccc}
\hline
\hline
\multicolumn{1}{c}{}
& \multicolumn{1}{c}{(a)}
& \multicolumn{1}{c}{(b)}
& \multicolumn{1}{c}{(c)} \\
\hline
\multicolumn{4}{c}{
Dwarfs} \\
\hline
$T_{\rm eff}$  & 2.177~$\pm$~0.071 & 2.184~$\pm$~0.098 & 2.186~$\pm$~0.092 \\
$\leq$$ 5700$~K & 2.177~$\pm$~0.084 & 2.176~$\pm$~0.108 & 2.185~$\pm$~0.102 \\
\hline
$T_{\rm eff}$  & 2.215~$\pm$~0.074 & 2.243~$\pm$~0.076 & 2.235~$\pm$~0.075 \\
$\leq$$ 6000$~K & 2.220~$\pm$~0.074 & 2.257~$\pm$~0.075 & 2.253~$\pm$~0.074 \\
\hline
\multicolumn{4}{c}{turnoff and subgiant stars}\\
\hline
$T_{\rm eff}$ & 2.260~$\pm$~0.098 & 2.297~$\pm$~0.119 & 2.307~$\pm$~0.127 \\
$\leq$$ 5700$~K & 2.252$\pm$0.099 & 2.301~$\pm$~0.126 & 2.284~$\pm$~0.106 \\
\hline
$T_{\rm eff}$ & 2.235~$\pm$~0.077 & 2.260~$\pm$~0.105 & 2.289~$\pm$~0.129 \\
$\leq$$ 6000$~K & 2.235~$\pm$~0.077 & 2.260~$\pm$~0.105 & 2.253~$\pm$~0.085 \\
\hline
\end{tabular}
\end{table}