http://www.physics.uoguelph.ca/gwp2/gfac/leibbrandt.html  George
http://www.wisc.edu/animalsci/faculty/leibbrandt.html     Vernon
http://www.cned.fr/EDEN/organ/o_leibb.htm                 Gottfried
http://www.euronet.nl/~gleibbra                           Gottfried
http://www.iae.nl/users/leibbran                          Hans
http://web.inter.NL.net/users/Christian.Leibbrandt/       Christian
http://www.partysquad.com/finland98/                      Christian
http://home-1.worldonline.nl/~knmg1450/                   Kees