@article{173547,
      url = {http://digitallibrary.un.org/record/173547},
      title = {The concept of services trade statistics : background note  /},
      publisher = {UN,},
      recid = {173547},
      pages = {9 p.},
      address = {Geneva :. 1993-09-15},
      year = {1993},
      month = {Sep},
}