@article{20212,
      author       = "Würtz, Gerhard and XIII. Congress of the International
                      Society for Photogrammetry, Helsinki, 1976. Commission I",
      title        = "New Developments of Equipment for Aerial Photography from
                      JENA in the Period from 1972 to 1976  ",
      year         = "1976",
      note         = "Resumé v jaz. franc. a rus., 1 sv.",
}