This is the graphics library, which we use for our books. It permits the creation of PostScript files from a FORTRAN program, and the automatic insertion into a LaTeX text.
A tar file of the graphics library with examples is available.
For unfolding the directories use the command
The authors are, what the ODE community calls the "Geneva Group".
A similar package, based on C++, is Martin's.
A short description complemented by simple examples is available as a gzip-ped tar file. Its author is Stefan Walter Schedenig, Vienna. .