Read the section on Blocking Designs (pages 185-190) in Julian Faraway's Practical Regression and ANOVA using R (2002). This treatment of the topic is very concise and to the point, and gives the R ...
This example uses statements for the analysis of a randomized block with two treatment factors occuring in a factorial structure. The data, from Neter, Wasserman, and Kutner (1990, p. 941), are from ...