@article{156791,
      author = {Tobin, Kenneth George,},
      url = {http://library.usi.edu/record/156791},
      title = {The Practice of constructivism in science education /},
      publisher = {L. Erlbaum,},
      recid = {156791},
      pages = {xvi, 344 p. :},
      address = {Hillsdale, N.J. :},
      year = {1993},
}