@article{309398,
      author = {Zazkis, Rina. and Campbell, Stephen R.},
      url = {http://library.usi.edu/record/309398},
      title = {Number theory in mathematics education : perspectives and  prospects /},
      publisher = {Lawrence Erlbaum Associates, Publishers,},
      recid = {309398},
      pages = {x, 294 p. :},
      address = {Mahwah, N.J. :},
      year = {2006},
}