@article{124614,
      note = {Revision of the author's thesis.},
      author = {Clancey, William J.},
      url = {http://library.usi.edu/record/124614},
      title = {Knowledge-based tutoring : the GUIDON program /},
      publisher = {MIT Press,},
      recid = {124614},
      pages = {377 p. :},
      address = {Cambridge, Mass. :},
      year = {1987},
}