@article{21380,
      author       = "Strusiński, H. and Rapport présenté á l´onzieme
                      Assemblée Générale de ĺ Union Géodésique et
                      Géophysique Internationale. Toronto, 3 - 14 Septembre 1957",
      title        = "On the vertical differential refraction and the influence
                      of temperature on a levelling instrument in short range
                      observations. Work carried out at the Chair of Higher
                      Geodesy of the Warsaw Institute of Technology during the
                      years 1954 - 1957  ",
      year         = "1957",
      note         = "1 sv.",
}