Twin directories of pdf:

[DIR]  ftp://ftp.uni-weimar.de/pub/publications/diss/Kuhne/pdf/
[DIR]  ftp://ftp.ox.ac.uk/pub/crypto/pgp/pgpi/6.0/docs/brazilian/pdf/
[DIR]  ftp://ftp.uni-leipzig.de/pub/plotter/Disk6/Disk6_1/pdf/
[DIR]  ftp://ftp.gfz-potsdam.de/pub/home/vst/lau/tsunami/Tsunami-Mittelmeer/Literatur/pdf/
[DIR]  ftp://ftp.gfz-potsdam.de/pub/home/dc/schulzea/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/sunsite.unc.edu/pub/Linux/docs/HOWTO/other-formats/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/doc/RH-DOCS/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/doc/HOWTOS/translations/sl/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/doc/HOWTOS/translations/sv/mini/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/doc/HOWTOS/translations/sv/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/doc/HOWTOS/other-formats/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/doc/HOWTOS/translations/de/mini/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/doc/HOWTOS/translations/de/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/doc/HOWTOS/translations/es/mini/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/mirror/ftp.redhat.com/pub/redhat/linux/6.2/en/doc/HOWTOS/translations/es/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/old/materialy-plytka-SO-2004-cd/strona_www_SO/Linux-doc/LinuxDeviceDrivers/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/old/materialy-plytka-SO-2004-cd/Linux_Documentation_Project/HOWTO/mini/other-formats/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/old/materialy-plytka-SO-2004-cd/Linux_Documentation_Project/HOWTO/other-formats/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/old/materialy-plytka-SO-2004/Linux_Documentation_Project/HOWTO/other-formats/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/old/materialy-plytka-SO-2004/strona_www_SO/Linux-doc/LinuxDeviceDrivers/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/old/materialy-plytka-SO-2004/Linux_Documentation_Project/HOWTO/mini/other-formats/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/materialy-plytka-SO-2005/Linux_Documentation_Project/HOWTO/mini/other-formats/pdf/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/materialy-plytka-SO-2005/Linux_Documentation_Project/HOWTO/other-formats/pdf/
[DIR]  ftp://ftp.kemsu.ru/pub/mirrors/www.linux.org.ru/books/HOWTO/pdf/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.ifi.uio.no/pub/pgp/6.0/docs/brazilian/pdf/
[DIR]  ftp://ftp.dit.upm.es/mirrors/ftp.ox.ac.uk/pub/crypto/pgp/pgpi/6.0/docs/brazilian/pdf/
[DIR]  ftp://ftp.unb.ca/pub/EBS/ebsdocs/ebs_admin_7.2/pdf/
[DIR]  ftp://ftp.unb.ca/pub/EBS/ebsdocs/ebs_install_7.2/pdf/
[DIR]  ftp://ftp.agfa.com/DRIVERS/pdf/
[DIR]  ftp://ftp.agfa.com/pub/med/pdf/
[DIR]  ftp://ftp.unice.fr/windows/drivers/imprim/winxp/pdf/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/LDP/lfs/LFS-BOOK-6.1.1-XML/stylesheets/pdf/
[DIR]  ftp://ftp.eenet.ee/arhiiv/gnu/gnu/Manuals/ddd/pdf/
[DIR]  ftp://ftp.eenet.ee/arhiiv/pgp/6.0/docs/brazilian/pdf/
[DIR]  ftp://ftp.eenet.ee/doc/LDP/FAQ/pdf/
[DIR]  ftp://ftp.eenet.ee/arhiiv/gnu/gnu/Manuals/autogen-5.5.4/pdf/
[DIR]  ftp://ftp.eenet.ee/arhiiv/gnu/gnu/Manuals/autogen-5.5.5/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.3/pub/gnu/Manuals/glibc-2.2.3/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.3/pub/gnu/Manuals/autogen-5.5.4/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.3/pub/gnu/Manuals/autogen-5.5.5/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.3/pub/gnu/Manuals/ddd/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.2/pub/gnu/Manuals/autogen-5.5.4/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.2/pub/gnu/Manuals/autogen-5.5.5/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.1/pub/gnu/Manuals/autogen-5.5.4/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.1/pub/gnu/Manuals/autogen-5.5.5/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.0/pub/gnu/Manuals/autogen-5.5.4/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.0/pub/gnu/Manuals/autogen-5.5.5/pdf/
[DIR]  ftp://134.121.1.1/pub/gnu.OLD/Manuals/ddd/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/hourly.1/pub/gnu/Manuals/autogen-5.5.4/pdf/
[DIR]  ftp://134.121.1.1/.snapshot/hourly.1/pub/gnu/Manuals/autogen-5.5.5/pdf/