@article{611,
      author       = "XIII. Congress of the International Society for
                      Photogrammetry. Helsinki, July 11 to 23, 1976. (Ostatní
                      materiály)",
      title        = "Abstract of Invited Papers, Working Group Papers and
                      Presented Papers  ",
      year         = "1976",
      note         = "Souběžný text a titulní list v něm., franc.",
}