@article{309394,
      author = {Johnston-Wilder, Sue. and Mason, John,},
      url = {http://library.usi.edu/record/309394},
      title = {Developing thinking in geometry /},
      publisher = {Open University in association with Paul Chapman Pub.,},
      recid = {309394},
      pages = {xii, 270 p. :},
      address = {London ;},
      year = {2005},
}