Online Material

Table 1: List of galaxies observed with the 3.6 m ESO telescope.

Table 2: List of galaxies observed with the VLT^a.

Table 3: Emission line intensities (3.6 m ESO observations).

Table 4: Emission line intensities (VLT observations).

Table 5: Ionic and total heavy element abundances (3.6 m ESO observations).

Table 6: Ionic and total heavy element abundances (VLT observations).

$\begin{figure} \par\hspace*{1mm}\psfig{figure=12414f1a.ps,angle=-90,width=16.cm,clip=} \end{figure}$	Figure 1: The flux-calibrated and redshift-corrected 3.6 m ESO telescope spectra of the emission-line galaxies.
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$\begin{figure} \par\hspace*{0.0cm}\psfig{figure=12414f1b.ps,angle=-90,width=16.cm,clip=} \end{figure}$	Figure 1: continued.
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$\begin{figure} \par\hspace*{0.0cm}\psfig{figure=12414f1c.ps,angle=-90,width=16.cm,clip=} \end{figure}$	Figure 1: continued.
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$\begin{figure}\par\hspace*{4mm}\psfig{figure=12414f1d.ps,angle=-90,width=16.cm,clip=} \end{figure}$	Figure 1: continued.
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$\begin{figure}\par\hspace*{4mm}\psfig{figure=12414f2a.ps,angle=-90,width=16.cm,clip=} \end{figure}$	Figure 2: The flux-calibrated and redshift-corrected VLT spectra of the emission-line galaxies.
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$\begin{figure}\par\hspace*{0.0cm}\psfig{figure=12414f2b.ps,angle=-90,width=16.cm,clip=} \end{figure}$	Figure 2: continued.
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$\begin{figure}\par\hspace*{0.0cm}\psfig{figure=12414f2c.ps,angle=-90,width=16.cm,clip=} \end{figure}$	Figure 2: continued.
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