@article{167604,
      url = {http://digitallibrary.un.org/record/167604},
      title = {International Cooperative Programme on Effects of Air  Pollution on Materials, including Historic and Cultural  Monuments : progress report /},
      publisher = {UN,},
      recid = {167604},
      pages = {2 p.},
      address = {Geneva :. 1993-04-27},
      year = {1993},
      month = {Apr},
}