@article{6112,
      author       = "Gonzáles, A. C. Salmán and XIII. Congress of the
                      International Society for Photogrammetry, Helsinki, 1976.
                      Commission III",
      title        = "Development of Aerial Triangulation in CETENAL Mexico  ",
      year         = "1976",
      note         = "Obr. a tab. v textu, 1 sv.",
}