@article{11060,
      author = {LeBlanc, John F.},
      url = {http://library.usi.edu/record/11060},
      title = {Graphs : the picturing of information /},
      publisher = {Indiana University Mathematics Education Development  Center,},
      recid = {11060},
      pages = {140 p. :},
      address = {[Bloomington] :},
      year = {1973},
}