\documentclass{article}
\usepackage{supertabular}
\begin{document}
\begin{table}
\tablecaption{The ISOGRK3 entity set}
\tablehead
 {\bfseries Entity&\bfseries Unicode Name&\bfseries Unicode\\ \hline}
\tabletail
 {\hline \multicolumn{3}{r}{\emph{Continued on next page}}\\}
\tablelasttail{\hline}
\begin{supertabular}{lll}
alpha  & GREEK SMALL LETTER ALPHA      & 03B1\\
beta   & GREEK SMALL LETTER BETA       & 03B2\\
chi    & GREEK SMALL LETTER CHI        & 03C7\\
Delta  & GREEK CAPITAL LETTER DELTA    & 0394\\
delta  & GREEK SMALL LETTER DELTA      & 03B4\\
epsi   & GREEK SMALL LETTER EPSILON    & 03B5\\
epsis  & GREEK LUNATE EPSILON SYMBOL   & 03F5\\
\end{supertabular}
\end{table}

\begin{table}
\tablecaption{The ISOGRK3 entity set, wider}
\tablehead
 {\bfseries Entity&\bfseries Unicode Name&\bfseries Unicode\\ \hline}
\tabletail
 {\hline \multicolumn{3}{r}{\emph{Continued on next page}}\\}
\tablelasttail{\hline}
\tabcolsep=2em\relax
\begin{supertabular*}{\textwidth}{lll}
alpha  & GREEK SMALL LETTER ALPHA      & 03B1\\
beta   & GREEK SMALL LETTER BETA       & 03B2\\
chi    & GREEK SMALL LETTER CHI        & 03C7\\
Delta  & GREEK CAPITAL LETTER DELTA    & 0394\\
delta  & GREEK SMALL LETTER DELTA      & 03B4\\
epsi   & GREEK SMALL LETTER EPSILON    & 03B5\\
epsis  & GREEK LUNATE EPSILON SYMBOL   & 03F5\\
\end{supertabular*}
\end{table}


\begin{mpsupertabular}{lll}
alpha  & GREEK SMALL LETTER ALPHA      & 03B1\\
beta   & GREEK SMALL LETTER BETA       & 03B2\\
chi    & GREEK SMALL LETTER CHI        & 03C7\\
Delta  & GREEK CAPITAL LETTER DELTA    & 0394\\
delta  & GREEK SMALL LETTER DELTA      & 03B4\\
epsi   & GREEK SMALL LETTER EPSILON    & 03B5\\
epsis  & GREEK LUNATE EPSILON SYMBOL   & 03F5\\
\end{mpsupertabular}


{\tabcolsep=2em\relax
\begin{mpsupertabular*}{\textwidth}{lll}
alpha  & GREEK SMALL LETTER ALPHA      & 03B1\\
beta   & GREEK SMALL LETTER BETA       & 03B2\\
chi    & GREEK SMALL LETTER CHI        & 03C7\\
Delta  & GREEK CAPITAL LETTER DELTA    & 0394\\
delta  & GREEK SMALL LETTER DELTA      & 03B4\\
epsi   & GREEK SMALL LETTER EPSILON    & 03B5\\
epsis  & GREEK LUNATE EPSILON SYMBOL   & 03F5\\
\end{mpsupertabular*}
}

\end{document}
