@article{28624,
      url = {http://digitallibrary.un.org/record/28624},
      title = {Generalized System of Preferences. Rules of origin : note  /},
      publisher = {UN,},
      recid = {28624},
      pages = {[5] p., including annexes.},
      address = {Geneva :. 1981-11-13},
      year = {1981},
      month = {Nov},
}