@article{18002,
      author       = "Astori, B. and XIII. Congress of the International Society
                      for Photogrammetry, Helsinki, 1976",
      title        = "Method for the Preparation of a Flight Planning over
                      Moutainous Areas for Map in Scales 1 : 5 000 and 1 : 10:000 
                      ",
      year         = "1976",
      note         = "1 sv.",
}