@article{130171,
      author = {Curcio, Frances R.},
      url = {http://library.usi.edu/record/130171},
      title = {Developing graph comprehension : elementary and middle  school activities /},
      publisher = {National Council of Teachers of Mathematics,},
      recid = {130171},
      pages = {viii, 85 p. :},
      address = {Reston, Va. :},
      year = {1989},
}