6McNamara JA. A method of cephalometric evaluation. Am J Orthod, 1984,86(4) :449 - 469.
7James A. McNamara. Jr: Cephalometric analysis of untreated adults with ideal facial and occlusal relationships. The International Journal of Adult Ort hod and Ort hog Surgery, 1988,3 (4) : 221 - 231.
8K. K. K. Lew,W. C. Foong. Horizontal skeletal typing in an ethnic chinese population with true class Ⅲ malocclusion. British Journal of Orthodontics Vol. 1993,20( 1 ) : 19 - 23.
9Jarvinea S. Floating norms for the ANB angle as guidence for clinical considerations. Am J Orthod, 1986,90 : 383.
10Jarvinea S. An analysis of the variation of the ANB angle. A statistical appeaisal. Am J Orthod, 1982,87 : 144.
