Twin directories of vol4:

[DIR]  ftp://ftp.etext.org/pub/CuD/CuD/vol4/
[DIR]  ftp://ftp.cs.toronto.edu/na/matlabDigest/vol4/
[DIR]  ftp://ftp.cac.psu.edu/pub/jbe/vol4/
[DIR]  ftp://cdsarc.u-strasbg.fr/0/more/HIP/cdroms/docs/vol4/
[DIR]  ftp://ftp.ics.muni.cz/pub/EMIS/journals/em/periodicos/file/em/vol4/
[DIR]  ftp://ftp.ics.muni.cz/pub/EMIS/journals/TICMI/blt/vol4/
[DIR]  ftp://ftp.ics.muni.cz/pub/EMIS/journals/TICMI/lnt/vol4/
[DIR]  ftp://ftp.ics.muni.cz/pub/EMIS/journals/MDEMP/vol4/
[DIR]  ftp://ftp.ics.muni.cz/pub/EMIS/journals/LJM/vol4/
[DIR]  ftp://ftp.ics.muni.cz/pub/EMIS/journals/GM/vol4/
[DIR]  ftp://ftp.ics.muni.cz/pub/EMIS/journals/GMJ/vol4/
[DIR]  ftp://ftp.ics.muni.cz/pub/EMIS/journals/BAMV/conten/vol4/
[DIR]  ftp://ftp.ubi.com/jp/splintercell/movie/short_film/vol4/
[DIR]  ftp://ftp.ccs.neu.edu/pub/mud/docs/mudlists/vol4/
[DIR]  ftp://ftp.cc.umanitoba.ca/cm/vol4/
[DIR]  ftp://203.191.227.56/pack/data/art/sound/seiyu/vol4/
[DIR]  ftp://203.191.227.58/pack/data/art/sound/seiyu/vol4/
[DIR]  ftp://ftp.math.ethz.ch/hg/EMIS/journals/TICMI/blt/vol4/
[DIR]  ftp://ftp.math.ethz.ch/hg/EMIS/journals/TICMI/lnt/vol4/
[DIR]  ftp://ftp.math.ethz.ch/hg/EMIS/journals/em/periodicos/file/em/vol4/
[DIR]  ftp://ftp.math.ethz.ch/hg/EMIS/journals/MDEMP/vol4/
[DIR]  ftp://ftp.math.ethz.ch/hg/EMIS/journals/BAMV/conten/vol4/
[DIR]  ftp://ftp.math.ethz.ch/hg/EMIS/journals/GMJ/vol4/
[DIR]  ftp://ftp.math.ethz.ch/hg/EMIS/journals/GM/vol4/
[DIR]  ftp://ftp.math.ethz.ch/hg/EMIS/journals/LJM/vol4/
[DIR]  ftp://ftp.gwdg.de/pub/EMIS/journals/TICMI/blt/vol4/
[DIR]  ftp://ftp.gwdg.de/pub/EMIS/journals/TICMI/lnt/vol4/
[DIR]  ftp://ftp.gwdg.de/pub/EMIS/journals/em/periodicos/file/em/vol4/
[DIR]  ftp://ftp.gwdg.de/pub/EMIS/journals/MDEMP/vol4/
[DIR]  ftp://ftp.gwdg.de/pub/EMIS/journals/LJM/vol4/
[DIR]  ftp://ftp.gwdg.de/pub/EMIS/journals/GM/vol4/
[DIR]  ftp://ftp.gwdg.de/pub/EMIS/journals/GMJ/vol4/
[DIR]  ftp://ftp.gwdg.de/pub/EMIS/journals/BAMV/conten/vol4/
[DIR]  ftp://ftp.gwdg.de/pub/EMIS/.old-saved/journals/LJM/vol4/
[DIR]  ftp://ftp.pbone.net/vol4/
[DIR]  ftp://ftp.podgoretsky.pri.ee/Docs/Java/Frolov/vol4/
[DIR]  ftp://203.191.227.57/pack/data/art/sound/seiyu/vol4/
[DIR]  ftp://gw1.vector.co.jp/pack/data/art/sound/seiyu/vol4/
[DIR]  ftp://data.bao.ac.cn/cats/more/HIP/cdroms/docs/vol4/
[DIR]  ftp://129.132.148.131/hg/EMIS/journals/em/periodicos/file/em/vol4/
[DIR]  ftp://129.132.148.131/hg/EMIS/journals/TICMI/lnt/vol4/
[DIR]  ftp://129.132.148.131/hg/EMIS/journals/TICMI/blt/vol4/
[DIR]  ftp://129.132.148.131/hg/EMIS/journals/MDEMP/vol4/
[DIR]  ftp://129.132.148.131/hg/EMIS/journals/BAMV/conten/vol4/
[DIR]  ftp://129.132.148.131/hg/EMIS/journals/GM/vol4/
[DIR]  ftp://129.132.148.131/hg/EMIS/journals/GMJ/vol4/
[DIR]  ftp://129.132.148.131/hg/EMIS/journals/LJM/vol4/
[DIR]  ftp://vintik.ihome.net.ua/pub/Info/Docs/System programming/Java/Программирование на Java/vol4/
[DIR]  ftp://ftp.ccs.neu.edu/.snapshot/weekly.1/pub/mud/docs/mudlists/vol4/