@article{239,
      author       = "Corten, F.L.J.H. and XIII. Congress of the International
                      Society for Photogrammetry, Helsinki, 1976. Commission I",
      title        = "A Decision Model for Optimising the Survey Flight System,
                      Including Choice of Aircraft  ",
      year         = "1976",
      note         = "Tab. v textu, 1 sv.",
}