PSGRAPH, Ray Tracing Graphics

PSGRAPH Notice.

The files
link.exe, fl.exe, fgraph.fi, fgraph.fd, and graphics.lib
are part of the FORTRAN 5.1 system routines.
The full list of the FORTRAN 5.1 system routines can be found at http://www.it-faq.pl/mskb/73/267.HTM

FORTRAN 5.1 compiler and linker options can be found at http://www.physics.gmu.edu/~amin/phys251/Topics/Languages/For_ms51.htm and at http://windsor.gsfc.nasa.gov/standards/cdf/doc/cdf25/cdf25frm.ps