This is Graph, the Perl module for graph operations as the code was for
the 1st edition of "Mastering Algorithms with Perl", by Jon Orwant,
Jarkko Hietaniemi, and John Macdonald, published in August 1999 by the
O'Reilly and Associates.
WWW: http://search.cpan.org/dist/Graph/
-Anton
<tobez@FreeBSD.org>