@article{172966,
      recid = {172966},
      title = {National Science Education Standards : observe, interact,  change, learn.},
      publisher = {National Academy Press,},
      address = {Washington, DC :},
      pages = {ix, 262 p. :},
      year = {1996},
      note = {"National Research Council"--Cover.},
      url = {http://library.usi.edu/record/172966},
}