\begin{table}%t5
\caption{Far infrared lines observed in HH54.}\label{tab:lws}   
\small%\centerline
{
\begin{tabular}{cccc}
\hline \hline
Term                                       & $\lambda$$_{\rm obs}$    &  $\lambda$$_{\rm vac}$           & $F\pm\Delta F$          \\
                                           & ($\mu$m)             & ($\mu$m)                     & (10$^{-13}$ erg s$^{-1}$ cm$^{-2}$)\\
\hline
$[{\ion{O}{i}}]$~$^3P_1$--$^3P_2$          &  63.18               & 63.18                        & 102 $\pm$    2           \\
o-H$_2$O~ 2$_{21}$--1$_{10}$               & 108.07$^b$           & 108.07                       & $<$1.2                \\
CO~23-22 + o-H$_2$O~ 4$_{14}$--3$_{03}$   & 113.54               & 113.458--113.537              & 1.3 $\pm$ 0.4            \\
OH~$^2\Pi_{3/2,5/2}-^2\!\Pi_{3/2,3/2}$      & 119.45               & 119.23--119.44                & 3.0 $\pm$ 0.3            \\
CO~20-19$^a$                              & 130.40               & 130.37                       & 0.9 $\pm$ 0.3            \\
CO~19-18                                  & 137.20$^b$           & 137.20                       & $<$1                   \\
p-H$_2$O~ 3$_{13}$--2$_{02}$               & 138.57               & 138.53                       & 1.0 $\pm$ 0.3            \\
CO~18-17                                  & 144.78$^c$           & 144.78                       & 2.1 $\pm$ 0.3            \\
$[{\ion{O}{i}}]~^3P_0-^3\!P_1$              & 145.52$^c$           & 145.52                       & 4.5 $\pm$ 0.3            \\
CO~17-16                                  & 153.19               & 153.27                       & 2.2 $\pm$ 0.3            \\
$[{\ion{C}{ii}}]$~$^2P_{3/2}$--$^2P_{1/2}$ & 157.72               & 157.74                       & 9.0 $\pm$ 0.4            \\
CO~16-15                                  & 162.73$^c$           & 162.81                       & 3.9 $\pm$ 0.2            \\
OH~$^2\Pi_{1/2,3/2}-^2\!\Pi_{1/2,1/2}$$^a$  & 163.04$^c$           & 163.12--163.40                & 1.5 $\pm$ 0.2            \\
CO~15-14                                  & 173.63$^b$           & 173.63                       & 6  $\pm$ 1               \\
o-H$_2$O~ 3$_{03}$-2$_{12}$               & 174.63$^b$           & 174.63                       & 2 $\pm$ 1$^d$            \\
o-H$_2$O~ 2$_{12}$-1$_{01}$               & 179.53               & 179.53                       & 7 $\pm$ 1                \\
CO~14-13                                  & 185.85               & 186.00                       & 6 $\pm$ 1                \\
\hline
\end{tabular}}
\medskip
Notes: $^a$ Not detected by Nisini et~al. (\cite{Nisi96}); \\
$^b$~fixed parameter;\\ $^c$~deblended lines; \\$^d$~signal to noise ratio less than~3.
\end{table}