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 GIFgraph: Copyright (c) 1995-1999 Martien Verbruggen.
 Chart::PNGgraph: Copyright (c) 1999 Steve Bonds.
 GD::Graph: Copyright (c) 1999 Martien Verbruggen.

All rights reserved. This package is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.

=head2 Acknowledgements

Thanks to Steve Bonds for releasing Chart::PNGgraph, and keeping the
code alive when GD reached version 1.20, and I didn't have time to do
something about it.

Thanks to the following people for contributing code, or sending me
fixes:
Dave Belcher,
Steve Bonds,
Mike Bremford,
Damon Brodie,
Gary Deschaines,
brian d foy,