@article{24164,
      author       = "Robertson, Kenneth D. and XIII. Internationaler FIG -
                      Kongress im September 1971 in Wiesbaden. Gruppe B -
                      Kommission 5 und 6",
      title        = "Precise Distance Measurement With the Geodolite Model 3 G 
                      ",
      year         = "1971",
      note         = "1 seš., 1 seš., 1 seš.",
}