@article{pearl:12-r399,
  author =       "Pearl, Judea",
  title = 	 "Book Reviews: Bias and Causation, Models and Judgment for Valid Comparisions by H.I. Weisberg",
  journal =      "Biometrics",
  year =         2012,
  volume =       "68",
  issue =        "2",
  pages =        "659--660"
}