@article{318901,
      recid = {318901},
      author = {Hatton, T. J. and Williamson, Jeffrey G.,},
      title = {Global migration and the world economy : two centuries of  policy and performance /},
      publisher = {MIT Press,},
      address = {Cambridge, Mass. :},
      pages = {xi, 471 p. :},
      year = {2005},
      url = {http://library.usi.edu/record/318901},
}