@article{691551,
      author = {Russell, Dianne J. and Hart, Hilary M.},
      url = {http://library.usi.edu/record/691551},
      title = {Gross motor function measure (GMFM-66 & GMFM-88)  user's manual  [electronic resource]/},
      recid = {691551},
      pages = {1 online resource (305 pages) :},
}