Ramon Littell and Walter W. Stroup are the authors of SAS for Linear Models, 4th Edition, published by Wiley.
The third edition...was published over a decade ago. Thus...theamount of brand-new and updated material in the fourth editionwould fully justify its purchase. ( The AmericanStatistician, Vol. 58, No. 1, February 2004) ...the authors have done an excellent job incorporating thelatest analysis methods and latest software updates...an excellentreference, on the I would have enjoyed having as a student...andone that I will certainly use now. (Technometrics, Vol. 45, No. 2,May 2003)