@article{30129,
      author       = "Blais, J.A.R. and XIII. Congress of the International
                      Society for Photogrammetry, Helsinki, 1976",
      title        = "SPACE -M- Spatial Photogrammetric Adjustment for Control
                      Exsistensions Using Independent Models  ",
      year         = "1976",
      note         = "1 sv.",
}