@article{242220,
      url = {http://digitallibrary.un.org/record/242220},
      title = {Integrated assessment modelling : some methodological  considerations : report /},
      publisher = {UN,},
      recid = {242220},
      pages = {10 p.},
      address = {Geneva :. 1989-12-20},
      year = {1989},
      month = {Dec},
}