@phdthesis{PatilThesis,
  author	= {Patil, Ramesh S.},
  month		= oct,
  year		= {1981},
  title		= {Causal Representation of Patient Illness for Electrolyte and Acid-Base Diagnosis},
  note		= {MIT/LCS/TR-267},
  school	= {Massachusetts Institute of Technology}
}