This is out of print but it's very easy to find a copy:

[George E. P. Box, Statistics for Experimenters: An Introduction to Design, Data Analysis, and Model Building][1]


  [1]: http://www.amazon.com/Statistics-Experimenters-Introduction-Analysis-Building/dp/0471093157/ref=sr_1_1?s=books&ie=UTF8&qid=1280870116&sr=1-1