The page:
http://www.gnu.org/software/hello/manual/automake/index.html seems to contain a copy of the Automake manual, although it shouldn't,
It's not a copy but a fake ".symlink". Cross-manual references are a
general problem throughout gnu.org. Perhaps we'll have a real solution
within a few months, I and others have been working toward it for a
while. Meanwhile, improving things would mean lots of manual work that
would just have to be undone, so we'll just have to live with it.
Thanks for the report,
Karl