@article{5909,
      author       = "Boulanger, Yu. D. and Pevnev, A. K. and Enman, V. B. and
                      IUGG - IAG, 15th General Assembly Moscow, 1 - 14 August
                      1971",
      title        = "Detecting Premonitory symptoms of Earthquakes by Geodesic
                      methods  ",
      note         = "1 sv.",
}