@article{481261,
      recid = {481261},
      author = {Giorgi, John.},
      title = {Math for water treatment operators practice problems to  prepare for water treatment operator certification exams /  [electronic resource] :},
      publisher = {American Water Works Association,},
      address = {Denver, Colo. :},
      pages = {xx, 365 p.},
      year = {2007},
      note = {"Science and technology"--Cover.},
      url = {http://library.usi.edu/record/481261},
}