@article{125668,
      recid = {125668},
      author = {Clements, Douglas H.},
      title = {Computers in elementary mathematics education /},
      publisher = {Prentice Hall,},
      address = {Englewood Cliffs, N.J. :},
      pages = {xii, 415 p. :},
      year = {1989},
      note = {Includes index.},
      url = {http://library.usi.edu/record/125668},
}