@article{8834,
      author       = "Hradílek, L. and The International Symposium on
                      Electromagnetic Distance Measurement and Atmospheric
                      Refraction, Boulder, Colorado,23 - 27 June 1969",
      title        = "Estimation of refraction from vertical angles  ",
      year         = "1969",
      note         = "3 obr., 1 tab., lit. 4, 1 seš.",
}