Twin directories of docbook:

[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/packages/current-src/pkgsrc/textproc/docbook/
[DIR]  ftp://130.239.17.6/sources.redhat.com/cygwinports/release/docbook/
[DIR]  ftp://199.6.1.174/sources.redhat.com/cygwinports/release/docbook/
[DIR]  ftp://ftp.int.ru/.1/FreeBSD/development/FreeBSD-CVS/src/contrib/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.freebsd.org/development/FreeBSD-CVS/src/contrib/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp2.sk.freebsd.org/FreeBSD/development/FreeBSD-CVS/src/contrib/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.gwdg.de/pub/FreeBSD/development/FreeBSD-CVS/src/contrib/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.sk.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/contrib/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/development/FreeBSD-CVS/src/contrib/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/packages/current-src/pkgsrc/textproc/docbook/
[DIR]  ftp://204.152.191.7/sources.redhat.com/cygwinports/release/docbook/
[DIR]  ftp://gcc.gnu.org/pub/cygwinports/release/docbook/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/netbsd/NetBSD-release-3-1/src/dist/wpa/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/netbsd/NetBSD-release-3-1/src/dist/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.funet.fi/.m/mirrors5/ftp.netbsd.org/pub/NetBSD/packages/current-src/pkgsrc/textproc/docbook/
[DIR]  ftp://128.118.2.96/pub/.mirrors/2/cygwin.com/cygwinports/release/docbook/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.ticklers.org/pub/NetBSD/packages/current-src/pkgsrc/textproc/docbook/
[DIR]  ftp://ftp.uvsq.fr/pub/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://core.ring.gr.jp/pub/NetBSD/packages/current-src/pkgsrc/textproc/docbook/
[DIR]  ftp://ftp6.tw.freebsd.org/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.esat.net/mirrors/.3/ftp.netbsd.org/pub/NetBSD/packages/current-src/pkgsrc/textproc/docbook/
[DIR]  ftp://ftp.esat.net/mirrors/.3/sources.redhat.com/pub/cygwinports/release/docbook/
[DIR]  ftp://ftp.pucpr.br/apache/velocity/docbook/
[DIR]  ftp://ftp.int.ru/.1/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.freebsd.org/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp2.sk.freebsd.org/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.za.freebsd.org/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.esat.net/mirrors/.1/ftp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.gwdg.de/pub/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.sk.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/freebsd/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://128.118.2.96/pub/.mirrors/1/ftp.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.li.kernel.org/pub/.3/sources.redhat.com/cygwinports/release/docbook/
[DIR]  ftp://ftp.au.netbsd.org/pub/NetBSD/NetBSD-current/pkgsrc/textproc/docbook/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/NetBSD-CVS/src/dist/wpa/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.mgts.by/pub/ubuntu-unnoficial/pool/main/d/docbook/
[DIR]  ftp://ftp.lug.udel.edu/pub/freebsd/development/FreeBSD-CVS/src/contrib/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.netbsd.org/pub/NetBSD/packages/current-src/pkgsrc/textproc/docbook/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/NetBSD-CVS/pkgsrc/textproc/docbook/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/textproc/docbook/
[DIR]  ftp://ftp.udc.es/mirror/freebsd/development/FreeBSD-CVS/src/share/sgml/docbook/
[DIR]  ftp://ftp.udc.es/mirror/freebsd/development/FreeBSD-CVS/src/contrib/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.udc.es/mirror/freebsd/development/FreeBSD-CVS/ports/textproc/docbook/
[DIR]  ftp://ftp.netbsd.org/pub/pkgsrc/pkgsrc-2008Q2/pkgsrc/textproc/docbook/
[DIR]  ftp://ftp.nsu.ru/mirrors/ftp.freebsd.org/pub/FreeBSD/development/NetBSD-CVS/src/dist/wpa_supplicant/doc/docbook/
[DIR]  ftp://ftp.sh.cvut.cz/storage/1/netbsd/packages/current-src/pkgsrc/textproc/docbook/
[DIR]  ftp://ftp.funet.fi/.m/mirrors2/sources.redhat.com/pub/cygwinports/release/docbook/
[DIR]  ftp://ftp.polytechnic.edu.na/pub/debian/pool/main/d/docbook/