\begin{table}%T6
\par
\caption{\label{t:reddeliter}Literature values for $E(B-V)$ and $E(b-y)$.
SFD98~=~Schlegel et~al. (\cite{Schlegel1998}); M+97~=~Marconi et~al. (\cite{Marconi1997}); K+01~=~Kim et~al. (\cite{Kim2001});
D+02~=~Dias et~al. (\cite{Dias2002}) (catalogue); KF91~=~Kjeldsen \& Frandsen (\cite{Kjeldsen1991});
CM92~=~Clari\'a \& Mermilliod (\cite{Clari1992}); B+99~=~Bruntt et~al. (\cite{Bruntt1999}); AT+88~=~\mbox{Anthony-Twarog}
et~al. (\cite{Anthony1988}); ATT00~=~\mbox{Anthony-Twarog} \& Twarog (\cite{Anthony2000}); M+02~=~Meibom et~al. (\cite{Meibom2002}).}
%\centering
\par
\begin{tabular}{lll}
\hline\hline
 $E(B-V)$          &   $E(b-y)$   & Reference and notes\\
\hline
\multicolumn{3}{c}{NGC~2506} \\
  0.087          &                 & SFD98\\
 0$-$0.07          &              & M+97 ${\rm [Fe/H]} \simeq 0 ~{\rm to}~ -0.4$\\
  $0.04\pm0.03$  &                 & K+01 \\
  0.081          &                 & D+02 ${\rm [Fe/H]}$ = $-$0.37\\
\multicolumn{3}{c}{NGC~6134} \\
$0.46\pm0.03$    &                 & KF91 \\
$0.35\pm0.02 $   &                 & CM92 ${\rm [Fe/H]}$ = $-$0.05\\
$0.365\pm0.006$  & $0.263\pm0.004$ & B+99 ${\rm [Fe/H]}$ = +0.28 \\
0.395            &                 & D+02 ${\rm [Fe/H]}$ = +0.18\\
\multicolumn{3}{c}{IC~4651}  \\
0.086            &                 & AT+88 \\
0.241            &                 & SFD98 \\
0.086            & 0.062           & ATT00 ${\rm [Fe/H]}$ = +0.08\\
0.099            & 0.071           & ATT00 ${\rm [Fe/H]}$ = +0.12\\
                 & 0.071           & M+02 ${\rm [Fe/H]} \simeq +0.12$ \\
\hline
\end{tabular}
\end{table}