@article{574579,
      url = {http://digitallibrary.un.org/record/574579},
      title = {Problems of data collection and quality control of data :  paper /},
      publisher = {[UN],},
      recid = {574579},
      pages = {3 p.},
      address = {Geneva :. 1997-08-13},
      year = {1997},
      month = {Aug},
}