@article{171049,
      url = {http://digitallibrary.un.org/record/171049},
      title = {United Nations to hold World Conference on Environment and  Development in Brazil in 1992.},
      publisher = {UN,},
      recid = {171049},
      pages = {3 p.},
      address = {New York :. 1990},
      year = {1990},
}