@article{186712,
      url = {http://digitallibrary.un.org/record/186712},
      title = {General introduction to non-seismic detection techniques :  working paper /},
      publisher = {UN,},
      recid = {186712},
      pages = {13 p.},
      address = {Geneva :. 1993-05-28},
      year = {1993},
      month = {May},
}