@article{33196,
      author       = "Lycken, L. E. and 8th International Congress of
                      Photogrammetry, Stockholm, 1956",
      title        = "Test measurements of grids  ",
      year         = "1956",
      note         = "1 sv., Communication of the Commission II., Zvl. ot. z
                      čas.:Svensk Lantmäteritidskrift, 1956, Congress Number",
}