@article{91670,
      url = {http://digitallibrary.un.org/record/91670},
      title = {Study tour in Bulgaria.},
      publisher = {UN,},
      recid = {91670},
      pages = {2, [7] p.},
      address = {Geneva :. 1982-03-23},
      year = {1982},
      month = {Mar},
}