Not exactly these words, but yes, I have past several hours to look for a head in nurbs on google.
This video get on my nerves : http://www.youtube.com/watch?v=ac4qV2uIF3Q

This pdf for Maya seems not bad too : http://www.lboro.ac.uk/departments/sota/IT_tutorial_web_site/maya/head_modelling_project/maya_head_modelling_Nurbs_curves.pdf