Twin directories of wikibooks:

[DIR]  ftp://200.17.202.1/CRAN/web/packages/wikibooks/
[DIR]  ftp://200.17.202.1/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.di.uminho.pt/pub/cran/web/packages/wikibooks/
[DIR]  ftp://ftp.di.uminho.pt/pub/cran/src/contrib/Archive/wikibooks/
[DIR]  ftp://200.17.202.16/CRAN/web/packages/wikibooks/
[DIR]  ftp://200.17.202.16/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.udc.es/mirror/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.cs.uu.nl/mirror/CRAN/web/packages/wikibooks/
[DIR]  ftp://ftp.cs.uu.nl/mirror/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.ecc.u-tokyo.ac.jp/mirror/cran.r-project.org/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.ecc.u-tokyo.ac.jp/mirror/cran.r-project.org/CRAN/web/packages/wikibooks/
[DIR]  ftp://ftp.stat.math.ethz.ch/pub/Software/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.stat.math.ethz.ch/pub/Software/CRAN/web/packages/wikibooks/
[DIR]  ftp://ftp.math.ethz.ch/sfs/pub/Software/CRAN/web/packages/wikibooks/
[DIR]  ftp://ftp.math.ethz.ch/sfs/pub/Software/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://200.17.202.17/CRAN/web/packages/wikibooks/
[DIR]  ftp://200.17.202.17/CRAN/src/contrib/Archive/wikibooks/
pkg://picon-domains_2008.01.02-1_all.deb:3520586/usr/share/picons/domains/org/  info  downloads[DIR]3  picon-domains_2008.01.02-1_all.deb/usr/share/picons/domains/org/wikibooks/
pkg://picon-domains_2008.01.02.orig.tar.gz:3512644/usr/share/picons/domains/org/  downloads[DIR]3  picon-domains_2008.01.02.orig.tar.gz/usr/share/picons/domains/org/wikibooks/
pkg://picon-domains_2008.08.15-1_all.deb:3535220/picon-domains-2008.01.02.orig/org/  info  downloads[DIR]3  picon-domains_2008.08.15-1_all.deb/picon-domains-2008.01.02.orig/org/wikibooks/
pkg://picon-domains_2008.08.15.orig.tar.gz:3526857/usr/share/picons/domains/org/  downloads[DIR]3  picon-domains_2008.08.15.orig.tar.gz/usr/share/picons/domains/org/wikibooks/
pkg://picon-misc_2001.01.02-2_all.deb:44006/picon-domains-2008.08.15.orig/org/  info  downloads[DIR]3  picon-misc_2001.01.02-2_all.deb/picon-domains-2008.08.15.orig/org/wikibooks/
[DIR]  ftp://ftp.ii.uib.no/pub/linux/sites/cran.r-project.org/web/packages/wikibooks/
[DIR]  ftp://ftp.ii.uib.no/pub/linux/sites/cran.r-project.org/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.uvigo.es/mirror/volumes/vol2/cran.r-project.org/pub/R/web/packages/wikibooks/
[DIR]  ftp://ftp.uvigo.es/mirror/volumes/vol2/cran.r-project.org/pub/R/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.au.freebsd.org/disks/la4/.p/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.au.freebsd.org/disks/la4/.p/CRAN/web/packages/wikibooks/
[DIR]  ftp://200.236.31.1/CRAN/web/packages/wikibooks/
[DIR]  ftp://packages.ndir.dscr.i18n.2008.11.29-21.31.00.gz/CRAN/web/packages/wikibooks/
[DIR]  ftp://200.236.31.1/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://packages.ndir.dscr.i18n.2008.11.29-21.31.00.gz/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.us.xemacs.org/pub/mirrors/CRAN/web/packages/wikibooks/
[DIR]  ftp://ftp.us.xemacs.org/pub/mirrors/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.au.freebsd.org/disks/la5/.p/CRAN/web/packages/wikibooks/
[DIR]  ftp://ftp.au.freebsd.org/disks/la5/.p/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://129.132.148.131/sfs/pub/Software/CRAN/web/packages/wikibooks/
[DIR]  ftp://129.132.148.131/sfs/pub/Software/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.ctex.org/mirrors/CRAN/web/packages/wikibooks/
[DIR]  ftp://ftp.ctex.org/mirrors/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.uvigo.es/mirror/CRAN/web/packages/wikibooks/
[DIR]  ftp://ftp.uvigo.es/mirror/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.ucr.ac.cr/CRAN/web/packages/wikibooks/
[DIR]  ftp://ftp.ucr.ac.cr/CRAN/src/contrib/Archive/wikibooks/
[DIR]  ftp://ftp.iitm.ac.in/cran/web/packages/wikibooks/
[DIR]  ftp://ftp.iitm.ac.in/cran/src/contrib/Archive/wikibooks/