@article{61745,
      url = {http://digitallibrary.un.org/record/61745},
      title = {The generalized system of preferences and the multilateral  trade negotiations : study /},
      publisher = {UN,},
      recid = {61745},
      pages = {iv, 44 p. :},
      address = {New York :. 1978},
      year = {1978},
}