\begin{thebibliography}{xx}

\label{CDI}
\bibitem[CDI]{CDI} \ \\
  \href{http://www.mpimet.mpg.de/cdi}
       {Climate Data Interface},
  from the
  \href{http://www.mpimet.mpg.de}
       {Max Planck Institute for Meteorologie}

\label{ECHAM}
\bibitem[ECHAM]{ECHAM} \ \\
  \href{http://www.mpimet.mpg.de/wissenschaft/publikationen/reports.html}
       {The atmospheric general circulation model ECHAM5},
  from the
  \href{http://www.mpimet.mpg.de}
       {Max Planck Institute for Meteorologie}

\label{GRIB}
\bibitem[GRIB]{GRIB} \ \\
  \href{http://www.wmo.ch/web/www/WMOCodes/Guides/GRIB/GRIB1-Contents.html}
       {GRIB version 1},
  from the World Meteorological Organisation
  (\href{http://www.wmo.ch}{WMO})

\label{netCDF}
\bibitem[netCDF]{netCDF} \ \\
  \href{http://www.unidata.ucar.edu/packages/netcdf/index.html}{NetCDF Software Package},
  from the
  \href{http://www.unidata.ucar.edu}{UNIDATA}
  Program Center of the University Corporation for Atmospheric Research

\label{PINGO}
\bibitem[PINGO]{PINGO} \ \\
  \href{http://www.mad.zmaw.de/Pingo/post/down/BigPingo.pdf}{The PINGO package},
  from the
  \href{http://www.mad.zmaw.de}{Model \& Data group}
  at the Max Planck Institute for Meteorologie

\label{SCRIP}
\bibitem[SCRIP]{SCRIP} \ \\
  \href{http://climate.lanl.gov/Software/SCRIP}{SCRIP Software Package},
  from the Los Alamos National Laboratory

\end{thebibliography}
