@article{1488611,
      url = {http://digitallibrary.un.org/record/1488611},
      title = {Signs for roundabouts /},
      publisher = {UN,},
      recid = {1488611},
      pages = {6 p.},
      address = {Geneva :. 1999-01-25},
      year = {1999},
      month = {Jan},
}