@article{450075,
      author = {Helpman, Elhanan.},
      url = {http://library.usi.edu/record/450075},
      title = {Understanding global trade/},
      publisher = {Belknap Press of Harvard University Press,},
      recid = {450075},
      pages = {x, 222 p. :},
      address = {Cambridge, Mass. :},
      year = {2011},
}