@article{173096,
      url = {http://digitallibrary.un.org/record/173096},
      title = {Codes for units of measure used in international trade :  draft revision of Recommendation No. 20 : note /},
      publisher = {UN,},
      recid = {173096},
      pages = {142 p. :},
      address = {Geneva :. 1993-08-31},
      year = {1993},
      month = {Aug},
}