Links
Design of Experiments (Morestream toolbox):
http://www.moresteam.com/toolbox/t408.cfm
The Arrangement of Field Experiments (Ronald Fisher)
http://digital.library.adelaide.edu.au/coll/special//fisher/48.pdf
Warning Signs in Experimental Design and Interpretation (Peter Norvig, Google)
http://norvig.com/experiment-design.html
Cambridge Lectures on Design of Experiments:
http://sms.cam.ac.uk/collection/125?mediaOffset=240&mediaMax=20
Randomization (David Cox):
http://sms.cam.ac.uk/media/1427
Causal Inference from Experimental Data: