@article{1872,
      author       = "Tengström, Erik and International Symposium on Terrestrial
                      Electromagnetic Distance Measurements and Atmospheric
                      Effects on Angular Measurements, Stockholm, 19 - 24 August
                      1974",
      title        = "Appendix to Dr Tengström´s letter to Dr Brein, January 10
                      1968, concerning the influence of humidity on
                      refractiondeterminations with the dual wavelength method  ",
      year         = "1974",
      note         = "1 seš.",
}