@article{476061,
      author = {Johnson, David W., and Johnson, Roger T., and Holubec,  Edythe Johnson.},
      url = {http://library.usi.edu/record/476061},
      title = {The new circles of learning cooperation in the classroom  and school / [electronic resource] :},
      publisher = {Association for Supervision and Curriculum Development,},
      recid = {476061},
      pages = {111 p. :},
      address = {Alexandria, Va. :},
      year = {1994},
}