@article{94173,
      url = {http://digitallibrary.un.org/record/94173},
      title = {Revision of the Trade Data Elements Directory (UNTDED) :  preparation of section 7, Occurrence of data elements in  forms aligned within the United Nations Layout Key (UNLK)  /},
      publisher = {UN,},
      recid = {94173},
      pages = {14 p. :},
      address = {Geneva :. 1990-06-27},
      year = {1990},
      month = {Jun},
}