1/28/2004   slide 31
Impossible Trident (aka Three-Pronged Blivet)
Picture Picture
By Shigeo Fukuda

SOURCES
_________________
http://psylux.psych.tu-dresden.de/i1/kaw/diverses%20Material/www.illusionworks.com/html/impossible_trident.html

http://catb.org/~esr/jargon/html/B/blivet.html