@article{253,
      author       = "Williams, D. C. and International Symposium on Terrestrial
                      Electromagnetic Distance Measurements and Atmospheric
                      Effects on Angular Measurements, Stockholm, 19 - 24 August
                      1974",
      title        = "A Dispersometer for the Measurement of Angular Refraction 
                      ",
      year         = "1974",
      note         = "4 obr., lit. 7., 1 seš.",
}