@article{127374,
      author = {Davidson, Neil,},
      url = {http://library.usi.edu/record/127374},
      title = {Cooperative learning in mathematics : a handbook for  teachers /},
      publisher = {Addison-Wesley Pub. Co.,},
      recid = {127374},
      pages = {409 p. :},
      address = {Menlo Park, Calif. :},
      year = {1990},
}