@article{1415,
      author       = "Williams, H. S. and Symposium International Society of
                      Photogrammetry, London, 9 - 13 August 1971",
      title        = "Analytical Aerial Triangulation by Trilateration Microscope
                       ",
      year         = "1971",
      note         = "1 seš., Invited Paper for the International Society for
                      Photogrammetry, Commission III (Aerial Triangulation)",
}