@article{457520,
      recid = {457520},
      author = {Sampson, Geoffrey. and Gil, David. and Trudgill, Peter.},
      title = {Language complexity as an evolving variable [electronic  resource] /},
      publisher = {Oxford University Press,},
      address = {Oxford ;},
      pages = {xiii, 309 p. :},
      year = {2009},
      url = {http://library.usi.edu/record/457520},
}