\begin{table}%t3
\caption{\label{defcal}The calibration of the HI deficiency parameter.}
 {
\begin{tabular}{cccc}
\hline\hline
\noalign{\smallskip}
Type	& $c$	& $d$	& Ref.\\
\hline
E-S0a	& 6.88	& 0.89	& HG84\\
Sa-Sab	& 7.75	& 0.59	& S96\\
Sb	& 7.82	& 0.62	& S96\\
Sbc	& 7.84	& 0.61	& S96\\
Sc	& 7.16 	& 0.87	& S96\\
Scd-Im-BCD & 7.45& 0.70	& G10\\
\hline
\end{tabular}
}
\par
\smallskip
References: 
HG84: Haynes \& Giovanelli (\cite{Haynes84}); S96: Solanes et~al. (1996); G10: 
Gavazzi et~al. (in preparation).
\end{table}