Tutorial about Curves (bezier and NURBS)

Hello.
I really have a lack in Curves!
Could you please tell me some URL, so I can improve my curve skills?

Hugo

Again, it’s IamInnocent who wrote a couple of tuts about curves and related topics.

See:
http://membres.lycos.fr/bobois/Tuts/Courbes/Courbes_de_bezier/Types_de_poignees_bezier/Types_de_poignees_bezier_en.html

All the tuts dealing with curves, BevOb, knotes etc. and of course the roller coaster tut.

Probably the most comprehensive collection of curve tuts.