@article{243904,
      url = {http://digitallibrary.un.org/record/243904},
      title = {Maintenance of the gas transportation pipeline systems :  revised questionnaire /},
      publisher = {[UN],},
      recid = {243904},
      pages = {7 p.},
      address = {Geneva :. 1993-03-16},
      year = {1993},
      month = {Mar},
}