@article{13497,
      url = {http://digitallibrary.un.org/record/13497},
      title = {Working paper /},
      publisher = {UN,},
      recid = {13497},
      pages = {[60] p., including annex.},
      address = {New York :. 1980-07-22},
      year = {1980},
      month = {Jul},
}