Hi All, I am using the Minitab GLM fine no problem. But I need a good citation that I can refer to that refers to the use of adjusted and sequential sums of squares especially as opposed to the use of stepwise regression (I have an a priori reason for ordering the explanatory factors). Any ideas? C. ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================