@article{166669,
      url = {http://digitallibrary.un.org/record/166669},
      title = {Calibration events for improved seismic verification of a  Comprehensive Test Ban Treaty : working paper /},
      publisher = {UN,},
      recid = {166669},
      pages = {12 p. :},
      address = {Geneva :. 1994-06-14},
      year = {1994},
      month = {Jun},
}