@article{138262,
      recid = {138262},
      author = {Callahan, Joseph F. and Clark, Leonard H.},
      title = {Teaching in the middle and secondary schools : planning  for competence /},
      publisher = {Macmillan ;},
      address = {New York :},
      pages = {x, 532 p. :},
      year = {1988},
      url = {http://library.usi.edu/record/138262},
}