Problem with on-line documentation for libstdc++

[Kick Damien-DKICK1]

I'm reading "Chapter 17: Library Introduction" section "Thread safety"
< http://gcc.gnu.org/onlinedocs/libstdc++/17_intro/howto.html#3 >:

    This message
    < http://gcc.gnu.org/ml/libstdc++/1999-q2/msg00168.html >, this one
    < http://gcc.gnu.org/ml/libstdc++/1999-q2/msg00159.html >, and this
    one < http://gcc.gnu.org/ml/libstdc++/1999-q2/msg00156.html > are
    the tops of related threads (all within the same time period)
    discussing threading and the IO library. Much of it is dealing
    with the C library, but C++ is included as well.

Unfortunately, each of those hyper-links is broken.  Would anyone be
able to help me find these e-mail threads, please?

--
Damien Kick