@article{93316,
      url = {http://digitallibrary.un.org/record/93316},
      title = {International classifications used in statistics : paper  /},
      publisher = {UN,},
      recid = {93316},
      pages = {6 p.},
      address = {Geneva :. 1990-05-16},
      year = {1990},
      month = {May},
}