@article{20317,
      author       = "Szabó, G. and XIIth Congress of the International Society
                      of Photogrammetry in Ottawa 1972",
      title        = "Nightime Photography of Load - way Curve of Forestry
                      Economical Rope - way  ",
      year         = "1972",
      note         = "1 sv., 3 obr., 1 tab.",
}