Fred Fixler was a great art teacher from southern California who died Jan 21, 2010. He was a student of Frank Reilly, and brought much of his teaching as well as his own experience of illustration to his students.
On his official website is more about him, and some of the notes and handouts that he generously gave his students. One of them is a nice plane analysis of a head. If you wanted to sculpt a little 3D reference maquette of this head, it would be a good one to use for reference.
Thanks, Steve Kloepfer
Previously on GurneyJourney: Plane Heads, Character Maquettes, Reilly and Beyond