@article{12042,
      author       = "Poso, S. and XIIth Congress of the International Society of
                      Photogrammetry in Ottawa 1972",
      title        = "Groupwise Sampling to be Applied to the Inventory of
                      Natural Resouces with the aid of Photo Interpretation  ",
      year         = "1972",
      note         = "1 sv., obr. v textu",
}